Answer :
Answer:
A
Step-by-step explanation:
the area (A) of a triangle is calculated as
A = [tex]\frac{1}{2}[/tex] bh ( b is the base and h the height )
let b represent the base then height h = 4b
given A = 800 , then
[tex]\frac{1}{2}[/tex] × b × 4b = 800
[tex]\frac{1}{2}[/tex] × 4b² = 800 , that is
2b² = 800 ( divide both sides by 2 )
b² = 400 ( take square root of both sides )
[tex]\sqrt{b^2}[/tex] = [tex]\sqrt{400}[/tex] , that is
b = 20
then height h = 4b = 4 × 20 = 80
