Dimensional Changes 1, 2, and 3 dimensions

A rectangle has a base of 10 mm and a height of 6 mm, and we double the height, what is the new perimeter and area?

• Perimeter = 22 mm and Area = 120 mm

• Perimeter = 44 mm and Area = 120 mm

• Perimeter = 32 mm and Area = 240 mm

• Perimeter = 32 mm and Area = 240 mm

A triangle has a perimeter of 16 cm and an area of 12 cm^2. If the dimensions are doubled what is the new perimeter and area?

• P =32 cm and A = 24 cm²

• P = 32 cm and A = 48 cm²

• P = 24 cm and A = 24 cm²

• P = 24 cm and 48 cm²

A pentagon has an area of 25 ft², the sides are tripled what is the new area?

• A = 75 ft²

• 100 ft²

• 200 ft²

• 225 ft ²

When the dimensions of a figure are changed by a scale factor of 3, what happens to the perimeter?

• The perimeter will be multiplied by 3

• The perimeter will be 3 more than the preimage

• The perimeter will be multiplied by 9

• There is no way to know, we don't have the measurements

The measurements of a hexagon are changed by a scale factor of 4, what will happen to the area?

• The area will be multiplied by a factor of 4

• The area will be multiplied by a factor of 8

• The area will be multiplied by a factor of 16

• We cannot determine the new area

The volume of a rectangular prism is 16 in³. If the dimensions are changed by a scale factor of 2, what is the new volume?

• 32 in³

• 64 in³

• 128 in³

• 256 in³

The rectangular prism has a height of 3 in. , width of 4 in., and a length of 5 in. If the length is doubled, what is the new volume?

• 120 in³

• 240 in³

• 480 in³

• 520 in³

When the dimensions of a solid are changed by a scale factor, what happens to the volume?

• It changes by the scale factor

• It changes by the scale factor squared

• It changes by the scale factor cubed

• None of the above

If the height of a triangle is doubled and the base is tripled. How many times bigger is the area of the new triangle?

• 2

• 6

• 3

• 1

What happens to the perimeter of a square if the sides are    halved?

• doubles
• halved
• quadrupled
• forthed