Question

The side of a triangle are 5cm, 10cm, 7cm long

Answer 1

Step-by-step explanation:

perimeter is 5+10+7

=22cm

area..

s= 22/2

11

by herons formula..

$area = \sqrt{(11(11 - 5)(11 - 10)(11 - 7)}$

$area = \sqrt{11 \times 6 \times 1 \times 4}$

$area = \sqrt{264}$

area = 16.2 cm

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