Answer:
-ei
Step-by-step explanation:

Area of triangle = 1/2(4)(4) = 16/2 = 8
if Area of square then A = 4 x 4 = 16
so answer
B. it's one half the area of square of side length 4 units
I think the answer is arithmetic.
I hope this helps! Be safe out there.
Sorry if I’m wrong