Question

slove this 18 no sum.

Answer 1

AS PER HERON's FORMULA AREA OF A TRIANGLE =
$\sqrt{s(s - a)(s - b)(s - c)}$
AND
$s = \frac{perimeter}{2}$
PERIMETER OF THE TRIANGLE IS 50cm

thus S = 25

AREA OF THE TRIANGLE =.
$\sqrt{25(25 - 12)(25 - 16)(25 - 20)}$
$= \sqrt{25(13)(9)(5)}$
$= 15 \sqrt{65}$



THERE ARE SUCH 16 TRIANGLES

THUS 16 × 15√65 = 240√65 cm²

Answer 2

your solution.........

hope it helps you. !!!!!