Question

The side of a triangle measure 13 cm 14 cm and 15 cm . what is its area?

Answer 1

use the heron's formula
a=13 cm
b=14 cm
c=15 cm
s=semi perimeter =13+14+15/2 = 21 cm

Answer 2

One side of the triangle =13cm
Secound side of the triangle =14cm
Third side of the triangle =15cm
ATQ =1/2*(13+14+15)
=1/2*42
=21
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