Question

The base length of a parallelogram is multiplied by 5. Which of the following describes the effect of this change on the area?

Answer 1

If the height is kept the same, then the area is multiplied by 5.

For example, let's say we had a parallelogram with the properties of:

• base = 2
• height = 3

The area would be base*height = 2*3 = 6 square units.

If we kept the height at 3 units, but multiplied the base by 5, then the base is now 2*5 = 10. The new area is base*height = 10*3 = 30 which is exactly 5 times larger than the old area

new area = 5*(old area)

new area = 5*(6)

new area = 30 square units