a right angle measures 90 degrees
Lines are not measured in degress, however there is a straight angle which measures 180 degrees.
The 3 interior angles of any triangle add up to 180 degrees.
a TRIANGLE HAS 180 DEGRESS! a new born knows that! LOL
A Suplementary Angle
180/60 is 3 degrees
Vertex angle: 180-42-42 = 96 degrees