Question

You are building a shelf that fits in a corner. In the figure, the entire shelf is 2 points ABC. If each unit in the coordinate plane represents one inch, then the

AREA of the shelf is
square inches. A(20,30) B(20,10) C(10,10)

Answer 1

100 square inches

Explanation:

The width of the shelf is BC = 20 - 10 = 10 inches.

The height of the shelf is AB = 30 - 10 = 20 inches.

The area of a triangle with these dimensions is ...

A = (1/2)bh

A = (1/2)(10 in)(20 in) = 100 in^2

The area of the shelf is 100 square inches.