Changing Dimensions Area

If you multiply each dimension by 6, then what is the effect on the surface area?

• The surface area is multiplied by 36.

• The surface area stays the same.

• The surface area is multiplied by 6

• The surface area is multiplied by 216.

Find the area of the figure after halving the dimensions.

• 9

• 12

• 36

• 18

If this circle is dilated by the scale factor of 2, what would be the new area in cm²?

• 48 cm²

• 24 cm²

• 6 cm²

• 36 cm²

When multiplying by a scale factor the area will multiply by...

• The same scale factor

• The scale factor doubled

• The scale factor squared (to the power of 2)

A rectangle has a base 4 ft and height of 5 feet. If the figure dilated by a scale factor of 2, what will be true about its area?

• The area is doubled.

• The area is multiplied by 4.

• The area stays the same

A figure is multiplied by the scale factor 1/4. What will be the change in area?

• The area will be 1/4 the original area.

• The area will be 1/8 the original area.

• The area will be 1/16 the original area.

What happens to the area of a polygon if the dimensions are tripled?

• the area is tripled

• the area is multiplied by 6

• the area is divided by 3

• the area is multiplied by 9

The radius of a circle is multiplied by 1/4. What happens to the area of the circle?

• the area is divided by 16

• the area stays the same

• the area is mutliplied by 4

• the area is divided by 4

If a rectangle has an area of 48 cm², what would be the area of a similar rectangle if the dimensions are doubled?

• 96 cm²

• 192 cm²

• 216 cm²

• 2304 cm²

• The perimeter of the new rectangle will be the same as the perimeter of the original rectangle.
• The perimeter of the new rectangle will be 2.5 times as large as the perimeter of the original rectangle.
• The perimeter of the new rectangle will be 5 times as large as the perimeter of the original rectangle.