Question

Find the length of each of the equal sides of the isosceles triangle, if the perimeter and unequal side are 40 cm, and 10 cm respectively. *​

Answer 1

Answer:

unequal side = 10 cm

perimeter = 40 cm

=> sum of equal sides = 40 cm - 10 cm = 30 cm

=> each equal side= 30 cm ÷ 2 = 15 cm

Sides are - 15 cm, 15 cm and 10 cm

Answer 2

Answer:

Your Answer

Step-by-step explanation:

Given,

perimeter = 40cm

unequal side = 10 cm

let be x as equal side,

equation according to question,

10 + x + x = 40 cm

2x = (40 - 10)cm

2x = 30cm

x = 30 ÷ 2

x = 15 cm

length of equal side is 15 cm

CHECK :

perimeter of isosceles triangle = a + b + c

= 15 + 15 + 10

= 40 cm