Question

Find the area of an Isosceles Triangle Whose Perimeter is 72cm and the base is 20cm.

Answer 1

Answer:

s = a+b+c/2

s=72/2

s=36cm

Area =

$= \sqrt{36(3 6 - 26)(36 - 26)(36 - 20)}$

$\sqrt{36 \times 10 \times 10 \times 16}$

$\sqrt{2 \times 2 \times 3 \times 3 \times 10 \times 10 \times 4 \times 4}$

$2 \times 3 \times 10 \times 4$

$= 240cm {}^{2}$