Search: math-triangles

Number of results: 186,518

math
The base in the Sierpinski triangle has 1 white triangle and zero black triangles. The first iteration has 3 white triangles and 1 black triangle. The second iteration has 9 white triangles and 4 black triangles. The third iteration has 27 white triangles and 13 black ...
Thursday, October 28, 2010 at 10:28am by anonymous

math
how can you estimate heights and distances you can't easily measure with rulers or tape measures by using the following methods? a) shadows and similar triangles b) mirrors and similar triangles c) small triangles nested within larger triangles. (it's not a multiple ...
Thursday, March 1, 2012 at 8:08pm by Dee -Ann

Math-Triangles
Sara, I understand what you're doing, but I think the question wasn't put clearly. Neither of the triangles here is right-angled. The two triangles are similar: their sides have the same ratio. We know one is 2*7:3*7:4*7 and the other is 2*9:3*9:x and we need to find x.
Saturday, October 17, 2009 at 1:11pm by jim

math
mat e. matics starts to construct a series of triangles. all the triangles are drawn such that the sum of the base and height are always 10cm. determine the maximum area of all these triangles.
Wednesday, January 21, 2009 at 8:53pm by garry

Algebra Alley(MATH)
Triangles ABC and RST are similar triangles. Angle A=2(x+15)^0 angle S=3x^0,and angle C=x^0. What are the measures of angles B,R,and T? What kind of triangles are they?
Monday, September 20, 2010 at 8:00pm by Bionca

math
drawing several kinds of triangles including a right triangle, than draw a square on each of the sides of the triangles. compute the area of the squares and use this information to investigate whether the pythagorean theorem works for only the right triangles.(use a geometry ...
Wednesday, May 16, 2012 at 12:14am by sue

Math Question
Which one of the following pairs of triangle must be similar? a) two isosceles triangles with congruent vertex angles b) two right triangles c) two scalene triangles with congruent bases d) two obtuse triangles a) if the two vertex angles are the same then the other two angles...
Sunday, March 4, 2007 at 3:18pm by Becky

math calculus
I must be missing something here. In order for the corners of the triangles to meet, each must have base m/√8 but that gives 4 triangles that just meet in the center if folded up. For their height to bee enough to form a pyramid, they must overlap, but then the shape...
Monday, December 3, 2012 at 9:52pm by Steve

Math
Bernice made a kite by putting 2 triangles together the base of each triangles is 9 inches The height of each triangles is 12 inches and the height of the other triangle is 16 inches What is the area of the kite?show your work.!!!
Tuesday, April 28, 2009 at 7:10pm by erika

math
I'm doing The Ambiguos case of triangles given SSA. My givens are a=6; b=7; alpha=30 degrees. how do I know if there's 2 triangles?
Wednesday, January 13, 2010 at 7:33pm by Natalie

Math-Triangles
Thank you both of you. Sorry to confuse you guys. Yes, the triangles are similar. I think I solved it, is x 36?
Saturday, October 17, 2009 at 1:11pm by Anonymous

algebra
Jeff made some designs using equilateral triangles, as shown bellow. He noticed that as he added new triangles, there was a relationship between the number of triangles, and the outer perimeter of the design. If the pattern is continued, what would be the outer perimeter of a ...
Sunday, November 13, 2011 at 8:32pm by Anonymous

6th grade math
Bernice made a kite by putting 2 triangles together The base of each trangle is 9 inches The height of each triangles is 12inches and the height of each triangles is 16 inches What is the area of the kite ? show your work (hint the area of a triangle is 1/2bh)
Tuesday, April 28, 2009 at 7:19pm by erika

Math-Triangles
I don't understand. There are two triangles, they are called similar triangles. The first triangle has Side A is 18 Side B is 27 Side C or hypotonuse is x Second Triangle Side A is 14 Side B is 21 Side C or hypotonuse is 28
Saturday, October 17, 2009 at 1:11pm by Anonymous

math
Assume that the sides of triangles are limited to whole-number measures. How many different triangles have a perimeter of 12 meters? Explain how you determined this.
Monday, March 28, 2011 at 6:21pm by JV

4th grade geometry?
Your description is unclear. If you have "3 triangles(in a pyramid shape)," there is a fourth triangle formed in the center with its apex inverted. Likewise, the "6 triangles(in a pyramid shape)" would have three inverted triangles within the figure. ...
Thursday, September 23, 2010 at 4:44pm by PsyDAG

math
how can you estimate heights and distances you can't easily measure with rulers or tape measures by using the following method? small triangles nested within larger triangles.
Thursday, March 1, 2012 at 8:49pm by HELP HELP HELP

Math-Triangles
I answered this below, but you didn't specify that the triangles are similar in the original question. That means that the clue is in my original answer.
Saturday, October 17, 2009 at 1:11pm by jim

math geometry
Yes 1. join two equilateral triangles 2. two congruent isosceles triangles, joined at the non-equal sides.
Tuesday, February 21, 2012 at 3:36pm by Reiny

math
The scale factor of two similar triangles is 2/5. if the perimeter of the small triangles is 80 cm, what is the perimeter of the large triangle?
Saturday, April 2, 2011 at 6:04pm by Anonymous

7th grade math please help Ms. Sue
Your answers are correct. In problem #9, right, scalene, and isosceles describe types of triangles, but some triangles can fit two of the definitions.
Wednesday, February 13, 2013 at 8:28pm by drwls

Geometry CA
24. Which pair of triangles, if any, can be proven congruent by the ASA Postulate? 25. Which of the following can you use to prove the triangles congruent? If the triangles cannot be proven congruent, select not possible. 26. Which of the following can you use to prove the ...
Tuesday, May 31, 2011 at 2:48pm by Anonymous

Math
since the diagonals are perpendicular and bisect each other, you have 4 right triangles, with legs 5 and 8. figure the angles of such triangles, and double them to get the angles of the rhombus.
Friday, October 19, 2012 at 9:46pm by Steve

math
if possible,draw two isosceles triangle in which all the equal-length sides in both triangles are congruent, but the two triangles themselves are not similar.
Wednesday, May 20, 2009 at 6:52pm by here

calculus
The base of a solid is a circle of radius = 4 Find the exact volume of this solid if the cross sections perpendicular to a given axis are equilateral right triangles. I have the area of the triangle (1/2bh) to be equal to 2sqrt(12) (1/2 * 4 * sqrt12) I don't know what to ...
Sunday, April 22, 2007 at 3:00pm by mark

math i don't get it
If 6 equilateral triangles are placed side by side so that only two sides of each triangle touch one of the other triangles, what shape is formed? Please explain the answer.
Monday, December 17, 2012 at 5:54pm by Anonymous

math
I know there are triangles where it is true, I'm just not able to prove it is true for all triangles. Did you draw the triangle I mentioned? If so, I must have goofed up somewhere. What sides, radius and altitudes did you get?
Friday, January 13, 2012 at 11:07am by Steve

math trigg.
which triangles do you use COS SIN or TAN?? You can use these relations on any ANGLE. THe sin, cos, and tan are dependent on the angle, it does not matter if the angles are in triangles, or if they are, what kind of triangle. Right triangles are especially helpful when using ...
Sunday, June 18, 2006 at 9:14pm by shelby

Math word problem
A diagonal line between opposite corners of a rectangle (the lawn) forms two right triangles. Apply the Pythagorean theorem to either of those triangles. The diagonal will be the hypotenuse in the formula.
Monday, October 27, 2008 at 5:39am by drwls

5th grade math
what are the 3 names for measuring triangles by side length? what are the 3 names for measuring triangles by the angle size? thank you website reference would be great :)
Wednesday, October 28, 2009 at 5:44pm by Margaret

math
make triangles and find the area of those triangles and then add em together. I need to find the area of a polygon,breaking into simpler parts. how do you do it?
Wednesday, April 18, 2007 at 8:03pm by jamay

maths-triangles
eventually it all comes down to triangles (and maybe rectangles for parts of it)
Tuesday, March 5, 2013 at 2:38pm by Steve

Algebra
No, I did it with similar triangles. Both triangles have same angles, you are given the bases of both triangles (7, 99) and the height of the smaller 6 height/base=heightclift/basetocliff reread: the 99 ft is from the point on the base of the horizontal to the bottom of the ...
Tuesday, November 10, 2009 at 6:47pm by bobpursley

5th grade math
Try dividing it into sections, finding the area of each section, then adding them all together. Many shapes will resolve into triangles, squares, and circles. (For example, the ears would be small triangles.)
Monday, February 13, 2012 at 3:03pm by Lily

Geometry
What is the hypothesis of the statement below? If two triangles are isosceles right triangles,then they are similar.
Wednesday, June 3, 2009 at 10:49pm by Sally

Math
The hypotenuse of,c of right triangle ABC is 7.0 m long. A trigonometric ratio for angle A is given for four different triangles. Which one of these triangles has the greatest area? Justify your decision. a)sec A=1.7105 b)cos A=0.7512 c) csc A=2.2703 d)sin A= 0.1515
Friday, November 26, 2010 at 7:43pm by Emily

11th grade
I'm doing The Ambiguos case of triangles given SSA. My givens are a=6; b=7; alpha=30 degrees. how do I know if there's 2 triangles?
Wednesday, January 13, 2010 at 7:17pm by Natalie

geomentry
finding the angles of triangles What triangles?
Thursday, March 29, 2007 at 11:29pm by jason

Geometry
The polygon can be divided up into six triangles, each with base=s and height=6 Since it is a hexagon, you know the triangles are equilateral triangles, with height (apothem) = s*sqrt(3)/2 So, if the apothem is 6, 6 = s*sqrt(3)/2, and s = 12/sqrt(3) = 4sqrt(3) A = 1/2 * a * p...
Tuesday, February 21, 2012 at 10:11pm by Steve

math
Could you not split your trapezoid into 2 triangles? What is the sum of the angles in each of the triangles? What is the sum of angles in the trap ?
Monday, November 30, 2009 at 9:11pm by Reiny

math
Represent the above relationship between the number of triangles and the perimeter of Of the figures they form by filling in the table below. Perimeter = a + b + c Number of Triangles Perimeter 1 6 + 6 + 5 = 17 2 3 .
Wednesday, May 22, 2013 at 4:10pm by shona

math
The following sequence of figures begins repeating in the fifth figure. The fifth figure has 2 squares, 2 triangles, and 1 rhombus. How many triangles will there be in the 176th figure?
Wednesday, June 13, 2012 at 3:46pm by nick

Math (trigonometry)
the baseball diamond is a square with sides 27.4 If you draw the two diagonals, they will meet at the centre, giving you 4 identical right-angled triangles. in each of these triangles 27.4 is the hypotenuse and the line going to the centre is the adjacent.
Sunday, December 2, 2012 at 4:43pm by Reiny

geometry
Chris is making a painting with only triangles. He wants each side of the triangles to be the same length. What kind of triangle will he paint?
Tuesday, April 2, 2013 at 10:31pm by Ms.Vargas

math
how can you estimate heights and distances you can't easily measure with rulers or tape measures by using the following methods? A. shadows and simular triangles B.mirrors and simular tiangles c. small tiangles nested within larger triangles
Sunday, October 28, 2012 at 6:15pm by dorothy morlan

3rd grade math hw help!
Well I suppose if you draw a horizontal line under the upper case A you get two triangles, an upper one that is already there and a big one that includes the little one. If you draw a diagonal line from upper left to lower right of Z you get two triangles. If you surround X ...
Monday, January 31, 2011 at 10:16pm by Damon

Math-Triangles
That was my question as well. I believe this is solving for similar triangles...or why else would the second triangle be part of the problem? What is the significance of the second triangle? And I am not getting a legitimate answer solving for x.
Saturday, October 17, 2009 at 1:11pm by Anonymous

geometry
In the triangle ABC call the incenter point P. The radius r of the incircle is just the altitude from P to each side of the triangle. Let a,b,c be the sides opposite A,B,C, respectively. Draw a line from P to each vertex, A,B,C. This divides the triangle into three smaller ...
Monday, November 28, 2011 at 11:36am by Steve

geometry
Pick any vertex and draw in two diagonals creating 3 triangles inside the pentagon. What is the angle sum of one triangle? How many triangles do you have ?
Saturday, May 16, 2009 at 10:51pm by Reiny

math
If a pair of corresponding angles are the same for two different triangles, then all three pairs of corresponding angles are the same, and the triangles are similar.
Wednesday, April 15, 2009 at 1:45pm by drwls

maths
Make them into a bunch of triangles with interior lines. Triangles do not change shape once the length of the three sides is fixed. (side,side,side --->congruent) For example once you draw one diagonal in a square, it is split into two triangles and will not squish into...
Monday, March 16, 2009 at 7:25am by Damon

math
the figure shows eight congruent triangles. redraw the figure with four fewer segaments, so that only four congruent triangles remain.
Thursday, March 26, 2009 at 3:16pm by donna

for Knights - Ta Daaaa
Take a look at http://www.algebra.com/algebra/homework/Triangles/Triangles.faq.question.577996.html where this very question is discussed.
Tuesday, January 1, 2013 at 11:49am by Steve

math
the figure is made of two identical triangles a 15 inch by 12 inch rectangle and a square of side 19 inches what is the length of one side of each triangle if all the sides of the triangles are equal in length
Wednesday, November 7, 2012 at 8:30pm by Anonymous

math
a figure is made up of two identical triangles a 15 inch by 12 inch rectangle and a square of side 19 inchs what is the lenght of one side of each triangle if all the sides of the triangles are equal in lenght
Wednesday, November 7, 2012 at 5:50pm by Anonymous

geometry
The two little triangles are similar to the big one because they are all right triangles sharing one angle so sharing all angles (sum is 180) A = CAD = BCD B = CBD = ACD CD/6 = 4/CD similar triangles CD^2 = 4*6 CD = 2 sqrt 6
Wednesday, May 23, 2012 at 7:25pm by Damon

Math-geometry
A regular polygon with all sides that are congruent and all angles that are congruent. Thus, the regular triangles are equilateral triangles, and the regular quadrilaterals are squares. All equilateral triangles are similar to one another and all squares are similar to one ...
Tuesday, February 26, 2013 at 8:54pm by PLEASE HELP

IMPOSSIBLE ALGEBRA >:(
I have a trapezoid, and the bases are lengths 18 inches and 12 inches. Dividing the trapezoid into unequal parts are triangles. In other words, the trapezoid is divided into 7 unequal triangles. 4 triangles are shaded. How do I find the area of the shaded region of the trapezoid?
Wednesday, August 27, 2008 at 6:10pm by Harsh

math
Monique is using similar triangles in her graphic-design project. The triangles are isosceles. One has a base of 5 inches and legs of 7.5 inches. If the other triangle has a base of 14 inches, how long are the legs?
Thursday, December 9, 2010 at 6:33pm by nicole

geometry
a perimeter of 15 cm two or more equal sides and each side a whole number of centimeters. Prove that there are only four of these triangles. You do no need to construct the triangles.
Sunday, October 30, 2011 at 2:37pm by koko

Pre Calculus/Trig
You can get c with the law of cosines. Then, draw the figure. You have a multitude of similar triangles. The idea is to use them to find the measure of radius, the distance on many of those triangles.
Thursday, October 11, 2007 at 9:04pm by bobpursley

math/geometry pls help
A coin of radius 1 cm is tossed onto a plane surface that has been tesselated by right triangles whose sides are 8 cm, 15 cm, and 17 cm long. What is the probability that the coin lands within one of the triangles?
Wednesday, April 21, 2010 at 8:23am by Eunice

math
Which of the following statements is true? A. all trapezoids are similar B.all isosceles triangles are the same C.all rectangles are similar D.all equilateral triangles are similar
Thursday, December 6, 2012 at 9:43pm by alfonso

geometry
Sorry - no figures here. Describe the triangles, if possible. If they're right triangles, it's possible that SAS will justify the assertion.
Friday, October 21, 2011 at 1:01pm by Steve

maths-urgently needed
see construction #2 at http://www.ask-math.com/constructing-triangles.html
Wednesday, January 23, 2013 at 2:46am by Steve

math
Viviani's Theorem proves this for isosceles triangles. If you take a look at http://www.cut-the-knot.org/triangle/VivianiByVectors.shtml where it is proved for equilateral triangles, you should be able to see that it applies equally well to arbitrary triangles. If not, you...
Sunday, December 2, 2012 at 9:01am by Steve

Geometry
The scale factor of two similar triangles is 2/5. if the perimeter of the small triangles is 80 cm, what is the perimeter of the large triangle?
Saturday, April 2, 2011 at 5:42pm by Amanda

typo
divide into four right triangles 6, 8 are legs so 3,4,5 triangles, hypotenuse is rhombus side = 10 10*4 = 40
Sunday, January 2, 2011 at 2:31pm by Damon

geometry
divide into four right triangles 6, 4 are legs so 3,4,5 triangles, hypotenuse is rhombus side = 10 10*4 = 40
Sunday, January 2, 2011 at 2:31pm by Damon

geometry
A geometry example of an if/then statement would be: If two sides and the included angle of a pair of triangles are equal, then the triangles are congruent.
Wednesday, May 28, 2008 at 10:15pm by drwls

Math
A side and the two angles at either end completely define the point where the two other sides intersect. Thus all sides and angles are reproduced for both triangles and the triangles are congruent. That is not the way they want you to wrte geometric proofs, but I hope you can ...
Friday, December 17, 2010 at 10:29pm by drwls

Geometry. Grade 10. Similar triangles
the ratios of the ares of two similar triangles is 4 : 9. What is the ratio of their altitudes drawn from corresponding sides?
Wednesday, December 9, 2009 at 2:00am by John. F

Triangle inequality?
http://www.algebra.com/algebra/homework/Triangles/Triangles.faq.question.577996.html
Wednesday, April 3, 2013 at 10:07pm by bobpursley

algebra
Since the sides are in common ratio between triangles, the triangles are similar. So, corresponding angles are equal. Angle R id congruent to Angle F.
Monday, December 12, 2011 at 4:27pm by Steve

geometry
triangles ABF and EDG are congruent. triangles ABF and GCF are equalateral. AG = 24 and CG = 1/5 AB. find the total distance from A to B to C to D to E
Friday, July 15, 2011 at 5:45pm by jordan

Geometry
Triangles ABF and EDG are congruent. Triangles ABF and GCF are equilateral. AG = 24 and CG =1/5 AB. FInd the total distance from A to B to C to D to E
Thursday, July 14, 2011 at 11:15pm by lisa

geometry
Triangles ABF and EDG are congruent. Triangles ABF and GCF are equilateral. AG = 24 and CG =1/5 AB. FInd the total distance from A to B to C to D to E
Thursday, July 14, 2011 at 8:10pm by lisa

math
It is a proof. Given: line DB bisects line AC line AD is parallel to line BE AD=BE Prove: DB=EC there are two triangles connected together by point B. They are labled A D B and B E C. D and E are the top points of the triangles. they look like they would be right angle ...
Sunday, October 8, 2006 at 8:52pm by ann

Triangles
solve any triangles satisfying alpha = 20 degrees b = 10 c = 16 b and c are 2 side values and if I use the pythagorean theorem and I get 18.18? Did I do this right?
Wednesday, November 14, 2012 at 3:16pm by Greg

math
A tangram is a geometric puzzle made from seven pieces that form a square. Trace the pieces, cut them out, and answer the following questions. The puzzle can also be seen on wikipedia web site. a. If the area of the entire square equals 1 unit, label each piece with its ...
Thursday, October 28, 2010 at 2:37pm by m

Math
I am to find the area of a square. It is cut in half and the line is measured at 6 square root 2. It also says that the two triangles are equallateral triangles. I know that the equation for a equalateral triangle is A = the square root of 3 times s squared / 4 How would I ...
Tuesday, December 15, 2009 at 2:01pm by Punkie

Geometry
They are similar. because ALL triangles have and will always have 180 degrees. BOTH of the right triangles have an 90 degrees angle, which leaves 90 degrees left in both triangles than they have an another angle which is less than 90 (x degree) just by knowing this, you can ...
Friday, May 2, 2008 at 11:24am by David

Pre-Calculus
Determine the number of triangles that can be formed with the given information. and if it forms two possible triangles solve all unknown angles and sides Angle A=116 degrees a=10 b=11
Sunday, April 7, 2013 at 11:25am by DW

Geometry
Triangles ABF and EDG are congruent. Triangles ABF and GCF are equilateral. AG = 24 and CG = 1/5 AB. What is the total distance from A to B to C to D to E?? Please I dont understand this
Sunday, July 17, 2011 at 11:40pm by Lydia

Please help on geometry - analytic geometry
http://www.algebra.com/algebra/homework/Triangles/Triangles.faq.question.461705.html
Friday, February 22, 2013 at 5:21pm by bobpursley

Geometry
Two Right Triangles have equal acute angles, yet one triangle is larger than the other. Therefore, the triangles much be _________________. I've looked everywhere in my books and on the internet and I cant find it.
Friday, May 2, 2008 at 11:24am by Kaite Lynn

math
the lengths of the sides of four triangles are listed as follows. which two triangles are similar? explain. a~ 5 cm, 6 cm, 8 cm b~ 6 cm, 7 cm, 8 cm c~ 8 cm, 10 cm, 12 cm d~ 12 cm, 15 cm, 18 cm
Saturday, December 4, 2010 at 1:23pm by Anonymous

geometry
f equilateral triangle JKL is cut by three lines as shown above to form four equilateral triangles of equal area, what is the length of a side of one of the smaller triangles?
Thursday, March 29, 2012 at 10:56am by Anonymous

geometry
take one of the right-angled triangles, call the base angle Ø tanØ = 20/80 = 1/4 Ø = appr. 14.04° can you take it from there? I see pairs of isosceles triangles !
Sunday, February 13, 2011 at 10:11pm by Reiny

Geometry
Hi Ms. Sue! Although I do appreciate your help I am still having trouble with this problem because I am confused about how to find the height of the triangles. I did notice I mistakingly wrote that I was working with right triangles, they are equilateral. Again, Thank you very...
Wednesday, February 24, 2010 at 12:24pm by Nicole

maths
Rudransh has a piece of cardboard in shape of a quadrilateral. He cuts it into two triangles such that angles formed at the vertices are bisected. He wants to find out whether the two triangles are congruent or not
Thursday, January 10, 2013 at 6:41am by Anonymous

geometry
A regular hexagon is composed of 12 congruent 30-60-90 triangles. If the length of the hypotenuse of one of those triangles is 18 square root 3, find the perimeter of the hexagon.
Wednesday, December 7, 2011 at 3:13pm by damon

math
Number of possible choices for the first point = 9. Number of possible choices for the second point = 8. Number of possible choices for the third point = 7. Possible triangles with specific order of points = 9*8*7 = 504. However, when we say triangle, we are not really ...
Wednesday, December 14, 2011 at 11:56pm by MathMate

geometry
a regular hexagon is composed of 12 congruent 30,60,90 degree triangles. if the length of the hypotenuse of one of those triangles is 18 square root 3 find the perimeter of the hexagon
Tuesday, December 13, 2011 at 1:12pm by damon

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