Question

Find the area of a triangle with perimeter 22cm, one side 9 cm and the difference of the other two sides is 7 cm

Answer 1

perimeter of triangle is a+b+c (sum of all sides)
so,
9+7+x=22
x=6
by herons formula
semiperimeter is 11
√s(s-a)+(s-b)+(s-c)