Question

The sides of a triangle are 13cm, 14cm, 15cm. find the area of the triangle

Answer 1

Answer:

Formula is 1/2×base ×height

1/2×13×14

7×13

91

Answer 2

Answer:

S = (a+b+c) / 2

S = (13+14+15) / 2

S = 42 / 2

S = 21

now

area of triangle =

$\sqrt{s(s - a)(s - b)(s - c)}$

$\sqrt{21(21 - 13)(21 - 14)(21 - 15)}$

$\sqrt{21 \times 8 \times 7 \times 6}$

$\sqrt{3 \times 7 \times 2 \times 2 \times 2 \times 7 \times 2 \times 3}$

2

$2 \times 2 \times 3 \times 7$

84 sq metre