How do i find the base if the hight is 7 and the area is 21

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(2) Answers

Kip

If this is about a rectangle, we can use the area equation and solve for the base:
area = height*base
base = area/height
base = 21/7
base = 3
If the figure is a triangle the procedure is the same but the area equation changes a bit:
area = base*height/2