# Math (triangles)

134,283 results

### 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 choice ...

### 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 choice ...

### 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 ...

### Math

Triangle ABC has coordinates A(-4,-2), B(0,-2), and C(-4,1). Triangle DEF has coordinates D(3,6), E(3,2), and F(0,2). Use coordinate geometry to determine if these two triangles are congruent. If they are not congruent, state the reason. A: The triangles are congruent. B: The ...

### 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.

### Math (please check my answer)

he figure below shows two triangles. Which statement about the triangles is true? i.imgsafe(.)org/c6dcf267d1.jpg The triangles are congruent by: 1. AAS<<< 2. ASA 3. SAS 4. They are not congruent

### 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?

### Geometry

Does the angle-side relationship in triangles correspond with specific triangles or does it apply in all triangles?

### Trig

Can someone check my answers? Find # of triangles possible: <A=44.3, a=11.5, b=7.7 ... 2 triangles, B=~27.9 or B=~152.1 <A=29.3, b=20.5, a=12.8 ... 2 triangles, B=~51.6 or B=~128.4

### Math

The first pattern of triangles it uses 4 matches ( 3 matches for build a triangle and 1 matches for connected to other triangles). a)Find the number of triangles if there are 100 matches? b) write the formulas

### TRIANGLE HELP!!!! (MATH!)

The two triangles above are similar. a. Find x using the ratio of the sides 12 cm and 16 cm: x/20 = 12/16 Show your work. b. Find x using the ratio of the sides 6 cm and 8 cm. Show your work. c. Explain why the answers to (a) and (b) should be the same. (The small triangles ...

### 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 ...

### Math

The figure below shows two triangles. Which statement about the triangles is true? i.imgsafe(.)org/c60dcd0488(.)jpg The triangles can be proven congruent by: 1. Angle angle side <<< 2. Angle side angle 3. Side angle side 4. The triangles cannot be proven congruent

### 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...

### 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?

### 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

### 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 ...

### 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.!!!

### Math

I have a triangle with equal sides. Then a s cons triangle is put in the middle so I have four triangles. Triangles are continued to be put instead so I have more and more triangles. As more triangles are added in the same space, the size of them are getting smaller. Could you...

### Math Help

The triangles are similar. Find the value of x. The triangles are right triangles. Triangle 1 has 18 on the left side and 24 on the left side. Triangle 2 has x on the left side and 6 on the right side. The triangles are facing each other. A. 6 B. 8 C. 30 D. 72 Is the answer B...

### math

An equilateral triangle with a base of 20 cm and a height of 17.3 cm is divided into 4 smaller equilateral triangles. What is true about this figure? A. The total perimeter of all 4 triangles is 70 cm. B. The total area of all 4 small triangles is the same as the area of the ...

### 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)

### 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.

### Math

One of two similar triangles has an area of 1/4 times that of the other. What is the ratio of its perimeter of the triangles? (I know the answer but I don't know the solution, please explain. Thank you very much!!)

### Math

If a triangl if a triangle triangle has a perimeter of three units with a row of two connecting triangles the parameters for units what is the perimeter of a row of Tronic 20 triangles triangles

### 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.

### 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 do ...

### 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?

### math

How many different triangles can you make with a perimeter of 12 units And also use integer values for the length of the sides to investigate how to make up your triangles

### Maths

It is observed that 1 triangle can be found in the 1st figure, 3 triangles in the 2nd figure, 6 triangles in the 3rd figure, and so on. John claims that more than 100 triangles can be found in the 15th figure? Do you agree? Explain your answer.

### 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.

### 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.

### Math

If six 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? We are thinking circle?

### math

The large red equilateral triangle has sides of 8x units. The midpoints of the red triangle are joined to form the blue triangle. The midpoints of the blue triangle ate joined to form the green triangle. The process of joining midpoints to form new triangles continues ...

### Math

How do I determine which of theses triangles are right triangles or not? I am given a table with: Traingle | Side 1| Side 2| Side 3| Q |6 6 30 R |6 4 10 S |5 4 41 T |5 4 3 I Know the equation a^2+b^2=c^2, and have applied it to this, but cannot get an answer…Help me please.

### 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 ...

### 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?

### Math

In this 2x3 grid, each lattice point is one unit away from its nearest neighbors. A total of 14 isosceles triangles(but not right triangles), each with an area of ½u squared have only two vertices that are one unit apart in the grid. how many such half-unit triangles have at ...

### Math

Which of the triangles described in the table is a right triangle? Triangles: Q, R, S, T Side 1: Q = 25, R = 26, S = 25, T = 25 Side 2: Q = 20, R = 20, S = 20, T = 26 Side 3: Q = 15, R = 26, S = 1,025, T = 650

### 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 ...

### Geometry

What is the hypothesis of the statement below? If two triangles are isosceles right triangles,then they are similar.

### 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?

### geography

mike has 2 mats that are in the shape of triangles. the scale factor of the 2 triangles maths is 7/4. what is the ratio of the perimeter?

### Math

Two triangles r the same height. The slope side of triangle A is double the slope of B. how do the lengths of these two triangles compare? My last question please help

### 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?

### 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 :)

### Math

Bob the builder has many sticks of length 3, 5, and 7. He wants to form triangles whose edges consist of exactly 1 stick. How many non-congruent triangles can he form with the sticks?

### 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

### 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?

### Math

(X+b) (x+c) where b <0 & c<0, the equation turns into x^2+gx+k What is true about g and k G<0 K>0 G<0 K<0 G>0 K>0 G>0 K<0 Two triangles r the same height. The slope side of triangle A is double the slope of B. how do the lengths of these two ...

### Math

Two triangles r the same height. The slope side of triangle A is double the slope of B. how do the lengths of these two triangles compare?

### 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?

### Math

Explain why the lengths of the corresponding sides of rectangles ABCD and EFGH vary proportionally. I cant post the picture of the triangles but the length of the first triangle DA=44 and the width AB=88. The second triangles length HE=35 and width EF=70

### help me pls geometry

Which tirangles must be similar 1. Two right triangles with a congruent acute angle 2. Two obtuse angles 3 Two isosceles triangles with congruent bases 4. Two scalene triangles with a congruent angle

### 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 ...

### 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

### 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 .

### geomentry

finding the angles of triangles What triangles?

### maths

Alan is using matchsticks to make isosceles triangles. Isosceles triangles have at least two sides the same length.How many different single isosceles triangles can he make with 45 matchsticks, using all the matchsticks each time? The answer is 11, but I can only work out 7, ...

### 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?

### 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.

### math

a square has a area of 60sq cm.what%is the area of one of the triangles formed by drawing both of the diagonals of the square of the area of the remaining triangles?

### Math

The following regular hexagon A ____________B / \ / \ / \ F\ /C \ / E\____________/D has two diagonals going through it, FD and CE. These two lines form 3 triangles. We know that the area of the hexagon is 1. What is the area of those 3 triangles?

### 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

### 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

### Discrete Math (function and similar triangles)

I need to show that (0,1) and (10, infinity) have the same cardinality. Can I use similar triangles with open intervals? For example, I defined the open interval (10, infinity) to be on the positive x-axis and (0,1) to be on the positive y-axis. Then I said to pick any point ...

### Math

How many triangles exist when the measure of angle B is 100 degrees, a =10 and b=5? a. none b. 1 triangle c. 2 triangles I have already solved this and I have found that there will be no triangle because by using the law of sines I found that the value is bigger than 1. So, I ...

### 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

### math

the figure shows eight congruent triangles. redraw the figure with four fewer segaments, so that only four congruent triangles remain.

### 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 don't understand this

### 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 don't understand this

### 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 ...

### 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 ...

### 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 ...

### 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?

### 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?

### 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

### 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

### 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

### 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?

### Math (please check my answer!!)

What other information is needed to prove that the two triangles congruent by SAS? Picture description: there are two triangles showing line LT = line MQ and L=M A. <T = <Q B. <G = <N C. Line GT = line NQ << D. Line LG = line MN

### Geometry

Determine whether each statement is always sometimes or never true. If the answer is sometimes or never draw a counterexample. Two congruent triangels are similar : Two squares are similar : Two isosceles triangles are similar : Two obtuse triangles are similar : Two ...

### Math

The bases of trapezoid ABCD are AB and CD. Let P be the intersection of diagonals AC and BD. If the areas of triangles ABP and CDP are 8 and 18, respectively, then find the area of trapezoid ABCD. I'm so confused... please help! I was thinking that if I found the bases and ...

### 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.

### 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 ...

### math

The ladders shown below are standing against the wall at the same angle. How high up the wall does the longer ladder go? (All measurements are in feet.) ladders 11.25 ft 12.5 ft 14 ft 14 ft 2. The pair of polygons is similar. Find the value of x. polygons 187.5 in. 12 in. 30 ...

### 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

### 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.

### Math

On a test I was given 2 triangles. One triangle gave measurements of all three sides as 2, 4, and 5. The next triangle had sides given 4 and 8 and it asked what the third side should be if the triangles were perpendicular. How would I solve this? Do I find the perimeter of ...

### 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

### 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 ...

### Geometry

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?

### 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?

### preclac

Evaluate tan^2 60 degrees +sin^2 45 degrees without using your calculator. a)5 b)7/3 c)1/2 d)7/2 Please help. Draw the 30-60 and 45-45 triangles. What is the answer? You ought to be able to do these from memory. If you cant, make and use flash cards on these triangles.

### 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

### Mathematics

Which shapes could this pentagon be decomposed into to find its area? Choose all that Apply. A) Three Triangles * B) Two Trapezoids C) Five Triangles ** D) One triangle and One Trapezoid *** (My answers are A,C and D).

### math

Given: segment AC and segment BD bisect each other at E prove: E is the midpoint of segment RS i don't know if you will be able to visualize the picture but just incase someone is i really need help on the proof for this one. Picture: two(supposedly congruent)triangles that ...

### math

Given that triangles PQR~STU:triangle #1 sides 8,9,10 triangle #2 3,?,? a) What is the ratio of similitude of PQR~STU triangles? Express answer in fractional form. b) What is the ratio of the perimeter of PQR~STU triangles? Express answer in fractional form.

### Calculus

Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. The diagonal of the square before...