Question

What is the base of a triangle with height = 7.4 cm and area = 48.1 cm2?

A. 355.94 cm
B. 6.5 cm
C. 13 cm
D. 177.97 cm

Answer 1

The area of a triangle is:

A=bh/2, where b=base length and h=height. Wish to solve for b so:

2A=bh

2A/h=b

b=2A/h, and we were told that A=48.1 and h=7.4 so:

b=(2*48.1)/7.4 cm

b=13cm

So the base of the triangle is 13 centimeters.

Answer 2

the formula is B=2*A/b

Answer is C.13cm