Answer:
He is not correct, beacuse the base is 10m
Step-by-step explanation:
To solve this problem we have to use the formula to calculate the area of a triangle and to clear the base
a = area = 100 m²
b = base
h = height = 20m
a = (b * h) /2
we solve b
(2 * a) /h = b
we replace the known values
b = (2 * 100m²) / 20m
b = 200m² / 20m
b = 10m
As we can see he is not correct, since the base is 10m
