Question

an isosceles triangle has perimeter 30cm and each of the equal sides is 12 cm find the area of the triangle

Answer 1

perimeter= 30cm

isosceles triagle has 2 sides equal

so,
sides are

12cm

12cm

(12+12)-30=6cm

so,

area of triangle=

1/2×b×h

= 1/2×12×6

$=36cm^2$

Answer 2

this is the right answer