A parallelogram has an area of 14 cm 2. If the dimensions of the parallelogram are doubled, what will the new area be?

Question

anonymous · Answer

A=bh
new area=(2b)(2h)=4bh, 4 times the original, or 56cm^2

anonymous · Answer

Area is measured in 'square' units, so the change in area, if the sides are changed by the same ratio, can be though of the square of the change in dimensions. If the dimensions are multiplied by 2, then the area becomes 2 squared = 2*2 = 4.
If both dimensions were trippled, then it would be 3*3 to give 9 times the area.