Solve the problem.
-A room in the shape of a triangle has sides of length 13.2 yd, 13.2 yd, and 10.9 yd. If carpeting costs $22.68 per sq. yd, padding costs $2.10 per sq. yd, and there is no charge for installation, how much, To the nearest dollar, will it cost to carpet the room? (Hint: Use Heron's Formula)
A)$65
B)$1899
C)$376
D)$1624

Question

Quizplus · Accepted Answer

Using Heron's formula, the semi-perimeter is (13.2 + 13.2 + 10.9) / 2 = 18.65 yd. The area is √(18.65(18.65-13.2)(18.65-13.2)(18.65-10.9)) ≈ 62.5 sq. yd. The total cost is 62.5 * (22.68 + 2.10) = $1,624.

Solve the Problem. -A Room in the Shape of a Triangle Has Sides