Question

a triangle has a perimeter of 13 and one side of length 3 if the length of the other two sides are equal what is the length of each of them​

Answer 1

5.

Step-by-step explanation:

Let  

′

x  

′

 be the length of one of the equal sides.

The perimeter of the triangle with sides a,b and c is P=a+b+c.

Substitute the values pf P=13 and a=3,b=x,c=x in P=a+b+c as shown below:

⇒13=3+x+x

⇒13=3+2x

→2x=13−3

⇒2x=10

⇒x=5

Therefore, the length of each of the side is 5.