Similar Figures and Area Measurement

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

A tree is 12 feet tall and casts a shadow 9 feet long. A building nearby casts a shadow that measures 24 feet. How tall is the building? (Draw a picture, set up a proportion)

• 24 feet

• 21 feet

• 27 feet

• 32 feet

Find y.

• 144

• 18

• 72

• 12

Solve the proportion.
____ = ____

• p=31.3

• p=308

• p=924

• p=532

What is the scale factor if the triangle on the left is the original?

• 2

• 3/2

• 2/3

• 1/2

• 0.25
• 0.5
• 2
• 1/2

What scale factor will "shrink" the larger trapezoid to the smaller trapezoid?

• 2

• 3

• 1/2

• 1/3

How many times smaller is the area of the smaller trapezoid compared to the area of the larger trapezoid?

• 4

• 1/4

• 2

• 1/2

How many times smaller is area of the second triangle compared to the area of the first triangle?

• 1/9

• 9

• 3

• 1/3

What is the scale factor from the first hexagon to the second hexagon?

• 2

• 1.5

• 3

• 4