Question

Find the area of a triangle whose sides are 3cm,6cm and 7cm

Answer 1

See below

Explanation:

It is NOT a RIGHT triangle so you cannot use 1/2 b * h

but you can use Heron's Formula

Area = sqrt( s (s-a)(s-b)(s-c) )

s = semi- perimeter = (3+6+7)/2 = 8

Area = sqrt ( 8 ( 8-3)(8-6)(8-7) ) = sqrt ( 80) = 8.9 cm^2