MATHEMATICS · Multi-part · CBSE · Mathematics · Heron's Formula · Heron's Formula
Problem
For a triangle whose sides measure 7cm, 8cm and 9cm, answer the following.
(i) Find the semi-perimeter of the triangle.
(ii) Calculate the exact value of its area, leaving the answer in simplest radical form.
(iii) Hence find the area correct to one decimal place (in square centimetres).