Practice for Geometry Test #5

Determine if the dilation from A and B is an enlargement or reduction. Then find the scale factor of the dilation.

• Enlargement with scale factor > 1

• Reduction with scale factor < 1

• Enlargement with scale factor < 1

• Reduction with scale factor > 1

Which figure shows a reduction and what is the scale factor.

• Figure 1, scale factor 2.

• Figure 1, scale factor 1/2.

• Figure 2, scale factor 2.

• Figure 2, scale factor 1/2.

What is needed on triangle XYZ to be able to compare it with triangle ABC for SSS similarity?

• The measurement of the angles.

• Two of the angles should be the same because it is isosceles.

• Side XY needs to be marked 5.

• Side XY needs to be marked 10.

What information is needed to prove that triangle ABC is similar to triangle XYZ using SAS similarity?

• They need to have at least two pairs of congruent angles.

• Angle A is congruent to angle Z.

• Angle B is congruent to angle Z.

• Angle C is congruent to angle Z.

In a rectangle, the ratio of the length to the width is 3:2, and its perimeter is 210 centimeters. Find the width of the rectangle.

• 5 cm

• 10 cm

• 21 cm

• 42 cm

Determine whether each pair of triangles is similar. Justify your answer.

• Yes, the triangles are similar because they have the same angles.

• No, the triangles are not similar because they do not have the same angles.

Determine which triangles are similar.

• Triangle ABC is similar to triangle FED.

• Triangle ABC is similar to triangle GIH.

• Triangle FED is similar to triangle GIH.

• None of the three triangles are similar to each other because their sides are not proportional.

Identify the similar triangles in the figure.

• Triangle ABD and Triangle DEF

• Triangle ABD and Triangle CDE

• Triangle BAD and Triangle CDE

• Triangle ABD and Triangle EDC

Tags

CCSS.HSG.SRT.A.2

Determine the value of x, then use it to find the length of AC.

• 30

• 22

• 10

• 8

If BE =10, BD = 5, and DA = 2, find EC.

• 2

• 4

• 6

• 15