Question

The measure of an equal side and the base of an isosceles triangle are in the ratio 7:4 find the measures of all sides of the triangle if it's perimeter is 54cm

Answer 1

let the given sides be x

7x=7x(equal sides of isosceles∆)

4x=base of ∆

it is given that,

perimeter=54cm

7x+7x+4x=54

18x=54

x=54/18

x=3 cm

the sides of triangle,

7x=7x=7×3=21

4x=4×3=12

sides of triangle are

21cm,21cm,12cm

hope this helps