Name_______________________________Do Now 27.1-6: Similar triangles

Circle the pair of triangles that is similar.

Name_______________________________Do Now 27.1-6: Similar triangles

Circle the pair of triangles that is similar.

Name_______________________________

Date______________Class Work 27.1a-6: Similar triangles

Corresponding sides are in the same place on similar triangles. On the triangles below, label all of the corresponding sides with the same letter.

Name_______________________________

Date______________Class Work 27.1a-6: Similar triangles

Corresponding sides are in the same place on similar triangles. On the triangles below, label all of the corresponding sides with the same letter.

A

B

CA

B C

A

B

CA

B C

Name_______________________________

Date______________Class Work 27.1b-6: Similar triangles

These triangles are similar because their corresponding sides are in proportion to each other.

_1 _ = 2_ 2 4

1 * 4 = 42 * 2 = 4

Write a proportion and find the cross products to find out if each pair of triangles is similar.

_2 _ = ____ 4

Is this pair of triangles similar?

Yes No

Is this pair of triangles similar?

Yes No

What about this pair of trapezoids?

10 8

5 4

Is this pair of triangles similar?

Yes No

Are these parrellograms congruent? 7 3 3 7

Is this pair of parellograms congruent?

Yes No

12

4

2

12

4

22

4

8

4 3 4

31

What about this pair of trapezoids?

10 8

6 4

10 8

Name_______________________________

Date______________Class Work 27.1c-6: Similar triangles

These triangles are similar because their corresponding sides are in proportion to each other.

_1 _ = y_ 2 4

1 * 4 = 42 * y = 4

y = 2

Write a proportion and find the cross products to find out if each pair of triangles is similar.

y1

4

2

_4 _ = ____ 8

y = y =

Name_______________________________Exit Slip 27.1-6: Similar triangles

A tree’s shadow is 10 feet long. A 5-foot pole next to it casts a shadow that is 4 feet long. If the triangles formed by each object are and its shadow are similar, how tall is the tree?

?? 5 ft.

10 feet 4 feet

16

3

8

4

2

6y y

Name_______________________________Exit Slip 27.1-6: Similar triangles

A tree’s shadow is 10 feet long. A 5-foot pole next to it casts a shadow that is 4 feet long. If the triangles formed by each object are and its shadow are similar, how tall is the tree?

?? 5 ft.

10 feet 4 feet

Name_______________________________

Date______________Class Work / Homework 27.1-6: Similar triangles

_1 _ = ____ 2

Is this pair of triangles similar?

Yes No

Is this pair of triangles similar?

Yes No

12

4

2 4 4

31

_3 _ = ____ 4

y = y =

The two triangles below are similar. What is the length of the missing side?

15in. ??? 5in.. 4in.

3in. 9in.

3

y

8

4 6

2 2

y