Unit 9 Vocabulary

By Kristan Burgess


  • Radians- The angle made by taking the radius and wrapping it along the edge of the circle.

  • Degrees- A measure for angles. There are 360 degrees in a full rotation.

  • Initial Side- Initial Side of an Angle is defined as the ray where measurement of an angle starts.

  • Coterminal Angle- Coterminal angles are angles in standard position that have a common terminal side.

  • Reference Angle- The smallest angle that the terminal side of a given angle makes with the x-axis

  • Unit Circle-The "Unit Circle" is a circle with a radius of 1.