What is the area of this triangle? Please help me.

Answer:
8 units²
Step-by-step explanation:
The area (A) of a triangle is calculated using the formula
A = [tex]\frac{1}{2}[/tex] bh ( b is the base and h the perpendicular height )
here b = LK = 7 - 3 = 4 units
and h = J → x- axis = 4 - 0 = 4, hence
A = [tex]\frac{1}{2}[/tex] × 4 × 4 = 8 units²