Question

A triangle has a perimeter of 13 and one side of
length 3. If the lengths of the other two sides are
equal, what is the length of each of them?
(A) 4
(B) 5
(C) 6
(D) 7
(E) 8

1. bonexptip

## (B) 5

Step-by-step explanation:
A triangle has a perimeter of 13 and one side of
length 3. If the lengths of the other two sides are
equal, what is the length of each of them?
(A) 4
(B) 5
(C) 6
(D) 7
(E) 8
having two equal sides is isosceles, remove the known angle from the perimeter and divide by two
(13 – 3) : 2 =
10 : 2 = 5
——————–
check
5 + 5 + 3 = 13

2. thnahdat
The length of another side of the triangle will be 5 so option (B) will be correct.

### What is a triangle?

A triangle is a 3-sided shape that is occasionally referred to as a triangle. There are three sides and three angles in every triangle, some of which may be the same.
The sum of all three angles inside a triangle will be 180° and the area of a triangle is given as (1/2) × base × height.
There are many types of triangles such that right-angle triangles, equilateral triangles, and much more.
Let’s say the length of the other sides are x
So,
Perimeter = sum of all sides
13 = x + x + 3
2x + 3 = 13
2x = 10
x = 5
Hence “The length of another side of the triangle will be 5 so”.