Question

A triangle has an area of 45 square units. Its height is 10 units.

What is the length of its base?

Answer 1

45=10x÷2
45×2=10x
90=10x
9=x
base is either 1,3,or 9

Answer 2

Area = 1/2 bh
45= 1/2 b 10
45= 5b
Divide by 5
9=b
b=9