Question

Find the value of x. What kind of angles are these?

Answer 1

Answer:

$\displaystyle Corresponding\:Angles; 40 = x$

Step-by-step explanation:

Corresponding Angles are congruent, therefore you set both angle measures equal to each other:

$\displaystyle 135° = [3x + 15]° → 120 = 3x; 40 = x$

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Answer 2

Hey there!

The answer to your question is $x = 40$

These are two parallel lines cut by a transversal, which means that they are corresponding angles and, therefore, $(3x + 15)$ is equal to $135$°:

$3x + 15 = 135$    

Subtract $15$ from both sides:

$3x = 120$

Divide both sides by $3$:

$x = 40$

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