Change in Dimensions

Each side length of the rectangle at the right is multiplied by 3. What is the new area?

• 1296

• 432

• 48

• 144

2. Each side length of the rectangle at the right is multiplied by a scale factor of 2. What is the new area?

• 1380

• 345

• 690

• 146

Each side length of the rectangle at the right is multiplied by a scale factor of 4. What is the new area?

• 1344

• 84

• 336

• 152

A rectangle has a perimeter of 28 cm and an area of 40 cm². It is multiplied by a scale factor of 3. What is the new area?

• 84

• 360

• 120

• 12

What is Dilation?

• Dilation means to enlarge or reduce
• Dilation means to reflect on something
• Dilation means to like something
• Dilation means to make something different by making it smaller

If the scale factor is greater than one, the new figure will be

• a reduction
• an enlargement
• a scale
• not proportional

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.

• The area is multiplied by 8.

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.

• The area will be 1/64 the original area.

Describe the effect of change on the area of the rectangle if the base and height are both multiplied by 1/5.

• The area is multiplied by 1/5

• The area is multiplied by 1/25

• The area is multiplied by 5

• The area is multiplied by 25

When a cube is tripled in size, then the volume is _______.

• 81 times larger
• 27 times larger
• 9 times larger
• 3 times larger