The measure of angle 1 would be 37 degrees because a straight angle is 180 degrees.
You subtract 143 from 180 to get 37 degrees.
measure of angle 1 = 37
For the measure of angle 3, it is the same as the measure of angle 1 because vertical angles have the same angle measure. Angle 1 and Angle 3 are vertical angles.
measure of angle 3 = 37
Angle 4 and Angle 2 are vertical angles, so they have the same measure.
The measure of Angle 2 is given (143).
measure of angle 4 = 143