Question

A triangle has an area of 20 cm2. If its base is 40% of its height, what is its height to the nearest tenth of a centimeter?

Answer 1

Let's call the base a and the height h
a.h/2 = 20
a.h = 40
2/5h.h = 40 (because a = 40%h)
h^2 = 100
h = 10
a = 4

Answer 2

10cm

Explanation: