Similar Triangles and Perimeter

Find side length X.

• 22.5

• 10

• 9

• 7.5

Are these two triangles similar? If so, how?

• Yes, AA ∼

• Yes, SAS ∼

• Yes, SSS ∼

• No

In similar Polygons, corresponding sides are ___ and corresponding angles are ___. (Fill in the blanks)

• congruent, proportional 

• proportional, congruent 

• congruent, congruent

• proportional, proportional

If two figures are similar their angles are______.

• proportional

• congruent

• supplementary

• complementary

Find the height of the tree.

• 8 ft

• 12 ft

• 13 ft

• 15 ft

What similarity theorem would prove that these triangles are similar?

• SAS∼

• SSS∼

• AA∼

• Side Splitter

Complete each proportion.
CB / DM  =  AC / ?

• BM

• MA

• BC

• AD

Determine whether the triangles are similar.

• SSS~

• AA~

• SAS~

• not similar

A tree is 12 feet tall and casts a shadow 9 feet long. A building nearby casts a shadow that measures 21 feet. How tall is the building? (Draw a picture, set up a proportion)

• 16 feet

• 21 feet

• 24 feet

• 28 feet

Identify the perimeter and area ratios for the following figures.

• Per. Ratio=8  Area Ratio=64

• Per. Ratio=8/48  Area Ratio=64/2304

• Per. Ratio=8/48  Area Ratio=8/48

• Per. Ratio=8/48  Area Ratio=2304/64