Geometry Chapter Test

The __________ is the ratio of a length of the new figure to the corresponding length on the original figure.

• reduction

• enlargement

• scale factor

• center of dilation

State the coordinate of the image of the given point B (4,9) under a dilation with center at the origin with the given scale factor of 2.

• B' (2 , 4.5)

• B' (-8 ,-18)

• B' (8 ,18)

• B' (9 ,4)

If your SF = 2.5, what type of dilation is it?

• Reduction

• Enlargement

When the scale factor of a dilation is less than one, the dilation is a reduction.

• True

• False

If your SF = 0.8, what type of dilation is it?

• Reduction

• Enlargement

Determine whether the triangles are similar by AA~, SSS~, SAS~, or not similar.

• AA

• SSS

• SAS

• Not similar

A model of a lighthouse has diameter 8 inches and height 18 inches. If the actual diameter of the lighthouse is 20 feet, find its actual height.

• 30 ft

• 35 ft

• 45 ft

• 50 ft

• 71 ft

• 78 ft

• 84 ft

Find x.

• 54/7

• 56/3

• 11

• 21/2

Solve for the variable x.

• x = 16.8

• x = 26.25

• x = 8.6

• x = 2.4