Question

sides of a triangle are cm 45 cm,39 cm and 42 cm cm, find its area

Answer 1

a = 45cm, b= 39cm, c= 42cm

s = (a+b+c)/2

s= 63

HERONS FORMULA

area = √s(s-a)(s-b)(s-c)

= √63 X 18 X 24 X 21

= √3X3X7X2X3X3X2X2X2X3X3X7

= 3X7X3X2X2X3

= 756 cm^2