Circle Theorems

Question	Answer
Image: Alternate_Segment_Theorem.JPG (image/JPG)	Alternate Segment Theorem
Image: Angles_between_a_tangent_and_radius.JPG (image/JPG)	The Angle between a tangent and the radius is 90 degrees
Image: Angles_in_a_cyclic_quadrilateral.JPG (image/JPG)	Opposite Angles in a cyclic quadrilateral add to 180 degress
Image: Angles_in_a_semicirle.JPG (image/JPG)	Angles in a semicircle are 90 degrees
Image: Angles_in_the_Centre_of_a_Circle.JPG (image/JPG)	The Angle in the center of a circle is twice the angle at the circumference.
Image: Angles_in_the_same_segment.JPG (image/JPG)	Angles in the same segment are equal
Image: Tangents_from_a_point_outside_the_circle.JPG (image/JPG)	Tangents from a point outside the circle are equal in length
Image: The_Perpendicular_from_the_centre_to_the_chord_bisects_the_chord.JPG (image/JPG)	The perpendicular from the center to the chord bisects the chord.

Resource summary

	Created by james-mellor almost 11 years ago