Question

A triangle has vertices X(2, 1), Y(5, 4), and Z(5, 1). What is the area of the triangle?

Answer 1

Explanation:

They gave you an easy triangle. You can tell by the coordinates that X and Z are horizontally aligned, and Y and Z are vertically aligned, so Z is a right angle.

Area = 0.5(XZ)(YZ) = 0.5(3)(3) = 4.5 square units.