Intro to Similar Figures

The pair of figures is similar. Find the missing side.

• x = 20

• x = 12

• x = 5

• x = 4

Are these triangles similar?

• Yes

• No

All angles in similar figures are congruent.  

• True

• False

Marvin's son is 3 ft tall. He casts a shadow of 1 foot. Marvin casts a shadow of 2.5 ft. How tall is Marvin?

• 3 ft

• 7.5 ft

• 1.2 ft.

• 0.8 ft.

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

Using a proportion, find the height of the tree.

• 62.5 ft.

• 36 ft.

• 16 ft.

Find missing side

• 5

• 7

• 9

• 11

Tell whether the two figures are similar. Explain your reasoning. (Hint: are they proportional?)

• Yes, similar because they are the same shape and side lengths are proportional.

• No, not similar because they are the same shape, but side lengths are not proportional.

• Yes, same shape

• No, different sizes

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

Tags

7.5.A

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.

Tags

7.5.A