What is the area of ABC?

If triangle ABC has vertices (0, 0), (6, 0), and (2, 3) in the xy-plane, what is the area of ABC?
A. 20
B. 9
C. 18
D. 10
E. 12

Correct Answer: B
Explanation/Reference:
Explanation:

Sketching ABC in the xy-plane, as pictured here, we see that it has base 6 and height 3. Since the formula for the area of a triangle is 1/2 × base × height, the area of ABC is 1/2 × 6 × 3 = 9.

Download Printable PDF. VALID exam to help you PASS.