<PRE><B>Question 952743</B>
Area=(1/2)(base)(height) Multiply each side by 2.
(2)(Area)=(base)(height) Divide each side by base.
(2)(Area)/(base)=height
(2)(72sqin)/(18in)=height
(2)(4in)=height
8in=height ANSWER: The height is 8 inches.
CHECK: 
Area=1/2(base)(height)
72 sq in=1/2(18 in)(8 in)
72 sq in=(9 in)(8 in)
72 sq in=72 sq in </PRE>