Question

Use the following diagram for questions 4 - 6.

Answer 1

Answer:

1. C

2. B

3. B

Step-by-step explanation:

Vertical angles are the angles opposite each other when two lines cross, thus angles with measures (x+77)° and 126° are vertical angles.

Vertical angles are congruent.

Hence,

$x+77=126\\ \\x=126-77\\ \\x=49^{\circ}$