Question

can anyone solve this

Answer 1

perimeter of isosceles = 2a + b

==> 14 cm = 2(5x)+4x

==> 14 = 10x+4x

==> 14 = 14x

==> x = 14/14

==> x = 1

so, 5x = 5(1) = 5

 base = 4(1) = 4

so, sides are 5,5,4

area of triangle =>

s = a+b+c/2 ==> 5+5+4/2 ==> 14/2 ==> 7

s = root 7 *  root 7-5  * root 7-5  *  7-4

==> root 7 * root 2 * root 2  * root 3

==> 2 root 21 cm^2

so, answer = d