What is the area of the triangle with sides of length $5$5 cm, $6$6 cm and $5$5 cm?
First find the semi-perimeter $s$s.
Hence find the area using Heron's formula.
Find the area of the triangle with side lengths of $5$5 cm, $5$5 cm and $8$8 cm.
Find the area of the triangle with side lengths of $6$6 cm, $5$5 cm and $9$9 cm.
Round your answer to two decimal places.
Find the area of the triangle.