Similar Figures and Proportions

Are the triangles similar?

• Yes
• No

Are the triangles similar?

• Yes
• No

All corresponding sides are proportional (same ratio) in similar figures.

• True
• False

All corresponding angles are congruent in similar figures.

• True
• False

The triangles are similar.  Find x

• 90
• 60
• 30
• 15

• JKL and MNO
• JKL and PQR
• MNO and PQR
• None

A triangle is dilated by a scale factor of 2. If the original area was 24, what will be the new area?

• 24
• 2
• 12
• 48

• A
• B
• C
• D

• A
• B
• C
• D

The area of a triangle is 20 square units. If the triangle is dilated by a scale factor of 2, which statement is true?

• The area of the new triangle will be 2 times the area of the old triangle.
• The area of the new triangle will be 3 times the area of the old triangle.
• The area of the new triangle will be 4 times the area of the new triangle.
• The two triangles will have the same area.