Perimeter and Area of Similar Figures

The figures are similar. What is the ratio of their perimeters?

• 18/24

• 3/4

• 1/2

• 36/24

The figures are similar. What is the ratio of their areas?

• 324/576

• 3/4

• 9/16

• 1/4

You are building a gable for the roof of your garage and created a scale model (shown in picture). How much wood will you need (in inches) for the garage if the ratio is 1/24?

• 336 inches of wood

• 72 inches of wood

• 192 inches of wood

• 8,064 inches of wood

The figures are similar. Find the perimeter of the rectangle RSTU.

• 21

• 33

• 66

• 99

Find the perimeter of the large triangle.

Mathematical Equivalence

ON

The figures are similar. Find the area of the larger rectangle.

• 108 ft²

• 54 ft²

• 6.75 ft²

• 100 ft²

The figures are similar. Find the area of the smaller rectangle.

• 20 in²

• 4 in²

• 10 in²

• 15 in²

A rectangle has a perimeter of 20 centimeters and an area of 24 square centimeters.

Find the perimeter of the rectangle that is made by enlarging the rectangle by a scale factor of 3.

_________ cm

A rectangle has a perimeter of 20 centimeters and an area of 24 square centimeters.

Find the area of the rectangle that is made by enlarging the rectangle by a scale factor of 3.

________ square cm

A rectangle has a perimeter of 20 centimeters and an area of 24 square centimeters.

Find the perimeter of the rectangle that is made by enlarging the rectangle by a scale factor of 10.

________ cm