Angles in Circles Summary

Angles in Circles

Summary

because of the symmetrical nature of a circle, there are several relationships between angles, lines and circles.

  • angle between radius and tangent
  • triangle formed by two radii and chord
  • angle in a semi-circle

Key Skills

solve circle problems using the above facts.

Vocabulary

circumference, arc, diameter, segment, tangent, radius, semi-circle, isosceles triangle.