Question

Find the third side of the isosceles triangle if the equal sides of the triangle are
12 cm, and the perimeter is 30 cm.

Answer 1

Answer:

6cm

Step-by-step explanation:

Equal sides of an isosceles triangle=12 cm

perimeter of an isosceles triangle=2a+b

2×12+b=30

24+b=30

b=30-24

b=6 cm

Answer 2

Answer :-

Third Side = 6 cm.

Explanation :-

Given :

• Equal sides of isoceles triangle are 12 cm.

• Perimeter of Triangle is 30 cm.

To Find :

• Third Side of Triangle.

Solution :

Let the third side be x.

Perimeter of Triangle = Sum of all sides.

So,

➛ 12 + 12 + x = 30.

➛ 24 + x = 30.

➛ x = 30 - 24.

➛ x = 6 cm.

Therefore, Third Side of Triangle = 6 cm.

Verification :

➛ 12 + 12 + x = 30.

➛ 24 + 6 = 30.

➛ 30 = 30.

LHS = RHS.

Hence, Verified.