Which side lengths could be the sides of a triangle? * A. 11.4, 11.4, 22.8 B. 21, 29, 39 C. 7, 9, 18 D. 3, 9, 16

B

Step-by-step explanation:

Here, we want to choose out of the options the one that represents the values of the sides of a triangle

The important thing to note here is like a law that would help us resolve this.

The rule is that the length of the two other sides must add up to be greater than the third side

With this, we shall be shopping for answers;

According to the law, the only answer is B

It is only in B that the sum of the length of two of the sides is greater than the third

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: