Question

Write a function rule for the area of a triangle with a base 4 in less than twice the height

Answer 1

A = h² - 2h

the area (A) of a triangle is

A = $\frac{1}{2}$ × base × height

let height be h then base = 2h - 4 =2(h - 2)

A = $\frac{1}{2}$ × 2(h - 2) × h

  = h(h- 2) = h² - 2h