Question

A wire of length 21 cm is bent to form an isosceles triangle of integral sides

Answer 1

Step-by-step explanation:

perimeter of triangle =78cm

The ratio of one of the equal sides to the base is 5:3

So, let base =3x cm and one of the equal sides=5x cm

We know that perimeter of triangle is sumof all sides

Given triangle is isosceles in which two sides are equal

So, 5x +3x+5x=78

13x=78

x=6

So, the length of base is 3(6)=18cm

hope it helps!!