Question

Perimeter of an isosceles triangle is 50cm. If one of the two equal sides is 18cm,

find the third side.​

Answer 1

Answer:

given,

x+y+z=50cm

=> 18 + 18 + z=50

therefore z= 50-36=14

(x,y,z are sides of the triangle)

Answer 2

Given that:

• The perimeter of an isosceles triangle is 50 cm.
• One of its equal sides 18 cm.

To Find:

• The third side.

Let us assume:

• The third side of isosceles triangle be x.

Formula used:

In an isosceles triangle.

• Perimeter = 2(Equal sides) + Third side

According to the question.

ㅤ↠ㅤ50 = 2(18) + x

ㅤ↠ㅤ50 = 36 + x

ㅤ↠ㅤx = 50 - 36

ㅤ↠ㅤx = 14

Hence,

• The third side of isosceles triangle is 14 cm.