Question

The sides of a triangular field are 25 m, 17m and 12 m. Its area is *


​

Answer 1

Answer:

using hero's formula

Step-by-step explanation:

$perimeter = 25 + 17 + 12$

$\: \: \: \: \: = 54$

$therefore. \: \: s = 27$

$area \: of \: triangle = \sqrt{s(s - a)(s - b)(s - c)}$

$= \sqrt{27(27 - 25)(27 - 17)(27 - 12)}$

$= \sqrt{27 \times 2 \times 10 \times 15}$

$= \sqrt{8100}$

$= 90$