The measure of angle 1 is 30°, and the measure of angle 2 is 110°. (Image is not drawn to scale). What is the measure of angle 4?
2 answers
idk how to do this need help
The sum of angles of a triangle =180°
Angle 1 + Angle 2 + Angle 3 = 180°
Subtract ( Angle 1 + Angle 2 ) to both sides
Angle 3 = 180° - ( Angle 1 + Angle 2 )
Angle 3 = 180° - ( 30° + 110° ) = 180° - 140° = 40°
Angles on one side of a straight line= 180°
In this case line 2 - 3 is a straight line so:
Angle 4 = 180° - 40° = 140°
Angle 1 + Angle 2 + Angle 3 = 180°
Subtract ( Angle 1 + Angle 2 ) to both sides
Angle 3 = 180° - ( Angle 1 + Angle 2 )
Angle 3 = 180° - ( 30° + 110° ) = 180° - 140° = 40°
Angles on one side of a straight line= 180°
In this case line 2 - 3 is a straight line so:
Angle 4 = 180° - 40° = 140°