Question

Each of the 2 equal sides of an isosceles triangle is twice as large as the third side. If the
perimeter of the triangle is 30 cm, find the length of each side of the triangle- 7th grade

Answer 1

Answer:

Let the third side be X CM

then

let remaining equal side be Y CM

now from question

Y=2X

now

Perimeter of triangle=30cm

X+Y+Y=30

X+2Y=30

X+2*2X=30

5X=30

X=6cm

Thrn Y=12cm

length of side of triangle is 6cm, 12cm, 12cm

Answer 2

Answer:

Other two sides=twice of third side=2x cm and 2x cm. Perimeter=30cm. Formula of permiter:sum of three sides. Therefore,X+2x+2x=30cm X+4x=30cm 5x=30cm X=30/5 X=6

Step-by-step explanation:

other two sides = twice of third side

= 2(2x) cm

Perimeter = 30 cm

perimeter = sum of three sides

Since, x+4x = 30 cm

5x = 30 cm

x = 30/5

x = 6 cm