Question

The perimeter of a isosceles triangle is 55cm.Each of the equal sides is two times the third side.find the length of equal sides.

1)20cm 2)21cm 3)22cm 4)23cm​

Answer 1

Answer:

3. 22cm is the right answer

Answer 2

Step-by-step explanation:

According to the question

Let the third side be x cm

Then according to question

Two equal side are : 2x , 2x

Perimeter P at a triangle is given as

P = a+b+c

55 = x+2x+2x

55= 5x

x = 55/5

x = 11 cm

so the third side is x= 11cm

and two equal side 2x = 2× 11 = 22 cm

and 2x = 2×11 = 22 cm