Medium
Using Heron's formula, find the area of a triangle with sides 8 cm, 15 cm, and 17 cm.
Explanation
Explanation
Semi-perimeter s = (8+15+17)/2 = 20.0. By Heron's formula, Area = √[s(s-a)(s-b)(s-c)] = √[20.0 × 12.0 × 5.0 × 3.0] = √3600.00 ≈ 60 cm².
PRO TIP
Re-check your working by substituting the answer back into the original question.