Chapter 12 Angles

  • Chapter 12

    Chapter Objective:

    * The sum of angle measures on a line is 180°. The sum of angle measures at a point is 360°. Vertical angles have equal measures.


    Vocabulary:

    Angles on a line - Two or more adjacent angles that have two rays form a line. The sum of angle measures on a line is 180°.

    Angles at a point - Two or more angles formed by rays that meet at a common point. The sum of angle measures at a point is 360°.

    Intersecting Lines - Lines that meet or cross one another.

    Vertical angles - A pair of angles directly opposite each other formed by intersecting lines. The congruent angles formed when two lines intersect.