The base of a parallelogram and a triangle are the same length, and both figures have the same area. what is true about height of the triangle? a. it is the same as the parallelogram's height. b. it is half of the parallelogram's height. c. it is twice the parallelogram's height. d. its height is twice its base.

Recall that the area of a triangle is  and the area of a parallelogram is .

The bases, , are equal, but the heights, are not necessarily.  Let us use to denote the height of the triangle and to denote the height of the parallelogram.

The areas of the triangle and the parallelogram are equal: .  Thus and .

That is, the height of the triangle is twice the height of the parallelogram.  The answer is c.

No i refuse to tell you the answer but the estimate is 10