Mathematics

Problem

Find the area of a triangle whose side lengths are

7\,\text{cm},\;8\,\text{cm},\;9\,\text{cm}

. a)

36\,\text{cm}^2

12\sqrt5\,\text{cm}^2

4\sqrt{30}\,\text{cm}^2

18\sqrt5\,\text{cm}^2