Question

what is the area of triangle lmn? 6 square units 8 square units 3 square units 4 square units

Explanation:

Step1: Determine coordinates of L, M, N

From grid: L(-1,1), M(1,3), N(3,1)

Step2: Calculate base length LN

LN: horizontal line (y=1), length = 3 - (-1) = 4

Step3: Calculate height from M to LN

Height = 3 - 1 = 2 (vertical distance)

Step4: Compute area of triangle

Area = $\frac{1}{2} \times base \times height = \frac{1}{2} \times 4 \times 2 = 4$

Answer:

4 square units