Question

does anybody know how to calculate the measure of the unlabeled green angle using degrees? pls help D;

Answer 1

23 Degrees

Explanation:

A half circle is measured at 180 degrees. However, there’s a portion of it cut off, say it is measured x degrees. We are given the portion left (Red’s) measure, so we can set up equations to solve for x.
(Measure of red) + (x) = (Total measure of half circle)

Putting known variables in, We get 157+x=180.
So the angle measurement of x is 23 Degrees.