Similar Figures Ratios

To find the height of a very tall pine tree, you place a mirror on the ground and stand where you can see the top of the pine tree.  How tall is the tree?

• 144 feet

• 72 feet

• 36 feet

Gwen scans a photo that is 4 in. wide by 6 in. tall into her computer. If she scales the height down to 3 in., how wide should the similar photo be?

• 3 in

• 2 in.

• 4 in

• 1 in

Complete each proportion.
CB / DM  =  AC / ?

• BM

• MA

• BC

• AD

Find the missing area. 

• 0

• 12

• 24

• 30

Find the missing area.

• 15

• 20

• 25

• 30

What is true about the sides of similar figures?

• Corresponding sides are proportional.

• Corresponding sides are congruent.

• Opposite sides are proportional.

• Opposite sides are congruent.

What is true about the shape and size of similar figures?

• Same shape and same size

• Same shape and not the same size

• Different shape and same size

• Different shape and not the same size

This symbol stands for ...

• is corresponding to

• is proportional to

• is congruent to

• is similar to

Scale factor is a ratio _____ to a side to find its corresponding side.

• multiplied

• divided

• added

• subtracted

When you multiply by a scale factor over 1, it will result in ...

• a reduction.

• the same size.

• an enlargement.

• a different shape.