Question

Q12. Perimeter of an isosceles triangle is 50cm. If one of the two equal sides are
18cm then find the third side​

Answer 1

=> 18 + 18 + x = 50

=> 36 + x = 50

=> x = 50 - 36

=> x = 14

therefore, the third side is of 14 cm.

Answer 2

Answer:

Let, the triangle be △ABC

Given, AB=CA=18 cm

Perimeter of the △ABC=50 cm

⇒AB+BC+CA=50 cm

⇒18 cm+BC+18 cm=50 cm

⇒BC=50 cm−36 cm=14 cm

Step-by-step explanation:

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