Question

the perimeter of an isosceles triangle is 42 cm and its base is 3/2 times each of equal sides find the area of the triangle

Answer 1

Answer: soside of triangle (a)=x

2nd side (b) =x

Base = 3/2x

Semi perimeter,= x+x+3/2x = 7x /2 =42

X =42*2/7

x =12cm

So side a =12 cm

(b) = 12cm

Base =3/2*12 =18 cm

Area =/'''''""""""""""''"'''''

/ 21 (21-12)(21-12)(21-18)

= under root 21*9*9*3

9 *3 unser root 7

27under root 7