Question

What is the length of MN

Answer 1

15, because angle L and N are equal, 3x=x+10 so x=5, plugging it in, we get that MN is 15

Answer 2

Option A.
`MN=15\ units`

Explanation:

we know that

An isosceles triangle has two equal sides and two interior equal angles

The triangle LMN is an isosceles triangle

therefore

`ML=MN`

substitute the values

`3x=x+10`

solve for x

`3x-x=10`

`2x=10`

`x=10/2=5\ units`

Find the length of MN

`MN=x+10` ----->
`MN=5+10=15\ units`