Question

The semi-perimeter of an isosceles triangle is 21 cm and its base is of its equal sides. Find the length of each side and area of triangle

Answer 1

Answer:

P=21cm

base=21 cm

Step-by-step explanation:

x+x+21=21

2x+21=21

21=21/2x

21=10.6x

x=21-10.6

x=10.4

a=10.4,b=10.4,c=21

s=a+b+c/2

A of triangle =