Similarity of Polygons and Triangles and Proportion

If two figures are similar, the corresponding sides are ______________.

• equal

• congruent

• proportional

• none of these

• BC

• AC

• MD

• MC

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

• x = 9

• x = 28

• x = 7

• x = 63

To measure the distance across a pond, a surveyor locates points A, B, C, D, and E as shown.  Find the length of AB to the nearest meter.

• 10

• 12

• 15

• 18

The triangles are similar, solve for the question mark.

• 8

• 12.5

• 18

• 24

What similarity theorem would prove that these triangles are similar?

• SAS∼

• SSS∼

• AA∼

• Side Splitter

Determine whether the triangles are similar.

• SSS~

• AA~

• SAS~

• not similar

A scale factor of less than one means

• that the image will be larger than the pre-image.

• That the image will be the same as the pre-image.

• That you need to subtract that amount off  of each side.

• That the image will be a reduction of the pre-image.

What is the value of X?

• X=4

• X=6

• X=3

• X=2

Are the triangles similar?

• Yes

• No