Question

the perimeter of an isoseles triangle is 21 centimetre.Find the measure of equal sides given that the third side is 5cm.please give with explanation​

Answer 1

Step-by-step explanation:

let the length of equal sides be x cm

unequal side length = 5 cm

perimeter = 21 cm

5+x+x=21.

(sum of lengths of all sides is called perimeter)

5+2x= 21

2x=21-5=16

x = 16/2

x= 8

therefore length of each equal side = 8 cm

Answer 2

Answer:

Perimeter of triangle = Sum of all sides

Given –

Perimeter = 21 cm

Two sides are equal = X cm

Third side = 5 cm

Solution –

X + X + 5 = 21 cm

2X = 16 cm

X = 8 cm

So, measure of two equal sides = 8 cm