Can someone please help me with this i’m sooo lost

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

Use circumcenter theorem to solve for the given values

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.