# triangles

1,163 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

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 ...

### 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

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

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 ...

### 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

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?

### 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 ...

### 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 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

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

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 ...

### 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

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 ...

### 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

Determine whether the pair of triangles is similar. Justify the answer. Triangle BAC with sides of 3, 3, 2 Triangle EDF with sides of 12,12,8 also the way I described the triangles, each side corresponds with the side underneath it, if that makes sense. like the 2 and the 8, ...

### 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.!!!

### 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)

### Geometry

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

### 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?

### 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?

### 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

### 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?

### 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?

### 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?

### 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

### 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

### 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

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.

### 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, ...

### 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

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

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.

### 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 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 ...

### 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

### 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?

### 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?

### 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

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

### 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 ...

### 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

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.

### 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

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 ...

### 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

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 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?

### 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, algebra

in a two by 3 grid, each lattice point is one unit from its nearest neighbours. a total of 14 isosceles triangles( but not right triangles), each with an area of 1\2 u2 have only two vertices that are one unit apart in the grid. how many such half unit triangles have at least ...

### 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/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?

### 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...

### 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

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 :)

### algebra

A set of 2 similar triangles was drawn in a design. One of the triangles was ½ of the other. If the measures of the smaller triangle were 5, 7, and 12 cm, the measures of the larger triangle = 10,14 and 20 cm. true or false

### 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

### 5th grade Maths

With help of the 10 equilateral triangles of side 3 cm, 8 rectangles of 4*2 cm and 4 square of 3*3 cm make 3 structures using all the figures. find the perimeter of all the triangles, squares, and rectangles??

### 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 ...

### geometry help needed.

I have a rectangle here with triangles inside. some triangles are blank others are shaded. -The area of the rectangle ABCD is 40in^2. What is the area of the unshaded region?

### Geometry

The diagonals of an isosceles trapezoid divided it into one pair of congruent triangles and one pair of similar triangles.

### 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?

### To: Reiny

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?

### 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

### geometry triangles

The sides of a triangle are 8,15 and 18 the shortest side of a similar triangle is 10 how long are the other sides? Find the scale factor of similar triangles whose sides are 4,12,20 and 5,15,25 Assume that traingle xyz is similar to triangle rpn with x(ray sign) r and p(ray ...

### Geometry Are these two triangles similar? Thanks!

Are these two triangles similar? How do you know? There are two triangles HMG and JMK They are connected at the top point at M H is on the bottom left, G is on the bottom right, and M is at the top for triangle HMG For triangle JMK J is on the bottom right and K is on the ...

### geometry

the transamerica pyramid building shown in the photograph has four faces shaped like isosceles triangles. The measure of a base angle of one of these triangles is about 85. What is the approximate measure of the vertex angle of the triangle?

### arithmetic

Laura sees 5 triangles she knows each triangle has 3 corners help laura sjip count to find how many corners are on 5 triangles

### math

The area ratio between 2 similar triangles is 225/81. Find the perimeter ratio of these triangles. a) 3/2 b) 225/81 c) 15/9

### maths-urgent

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 without actually super positioning them on one another.

### 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

### geometry

There are two noncongruent triangles that have a 9-inch side, a 10-inch side, and that enclose 36 square inches of area. Find the length of the third side in each of these triangles.

### geometry

There are two noncongruent triangles that have a 9-inch side, a 10-inch side, and that enclose 36 square inches of area. Find the length of the third side in each of these triangles.

### geometry

There are two noncongruent triangles that have a 9-inch side, a 10-inch side, and that enclose 36 square inches of area. Find the length of the third side in each of these triangles.

### 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

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 .

### Precalc/Triangles

Draw and solve any triangles satisfying alpha = 29 degrees a = 7 c = 14 I realize I need to draw a non-right triangle and label the sides but I am completely confused one what to do after I draw the triangle

### 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?

### 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?

### Trig

Does this result in no triangle, 1 or 2 triangles? If so, then solve. B= 88 degrees, b= 4 and a=23. I know that A= (sin 88)(23)/(4)= A=5.74 degrees C= 180-5.74-88= C=86.26 degrees c=(sin86.26)(4)/(sin 88)= c=3.99 My question is how do you know if it's 0,1, or 2 triangles. And ...