The measure of the angle (∠4) is equal to 59°.
Angles
Some angles are classified according to your respective sum. For example:
Complementary angles are angles whose sum is equal to 90°.
Supplementary angles are angles whose sum is equal to 180°.
From the image given, it is possible to see that the angles: ∠4, 60° and 61° are supplementary angles. Rename ∠4 to x, thus you can write.
x+60+61=180
x+121=180
x=180-121
x=59°
Therefore, the angle ∠4 is equal to 59°.
Read more about supplementary angles here:
https://brainly.com/question/12919120
