### Circle theorems 1,2 and 3

In class on December 13th we learned about the first 3 theorems of circles and lines inside circles.

1. If an angle inscribed on a circle intercepts a semi-circle or semi-arc, then

the angle inscribed is a right angle.

2.If 2 angles inscribed on the same circle intercept the same arc, then the angles are congruent.

3.If an inscribed angle and a central angle in the same circle intercept the same arc, then the measure of the central angle must be twice the measure of the inscribed angle.

These rules apply to lines that are ina cricle of any size.