Question

On a coordinate plane, triangle L M N has points (negative 1, 2), (negative 1, negative 4), and (3, negative 4).
What is the area of triangle LMN?

12 square units
14 square units
15 square units
24 square units

Answer 1

Vertices: L(-1,2), M(-1,-4), N(3,-4). LM is vertical with length 6, MN is horizontal with length 4, so the triangle is right with legs 6 and 4. Area = 1/2·6·4 = 12 square units.

Answer: 12 square units.