Chapter 9 - Section 9.3 - Area, Volume, and Surface Area - Exercise Set - Page 633: 6

$17\frac{1}{2}\ ft^2$

Work Step by Step

The area of a triangle is 1\2 base times height. $A=\frac{1}{2}(7ft)(5ft)=\frac{35}{2}ft^2=17\frac{1}{2}ft^2$

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