Kru gary is awesome 

angle is the figure formed by 2 rays,called the side of the angle, sharing a common endpoint, called the vertex of the angle.

question 1
one angle with a measure of 90°is know as a_________angle.
answer: right angle
if one angle of a linear pair is 30°,then the measure of the other angle in the pair is_________°.
answer: 150°
Jerry has a triangle window in his room. If angle one measures 63°, and angle two measures 77 degrees, what is the measure of angle 3
answer: 40°