Angle relationships - Angles and Lines

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Angles and Lines Topics:

Angle relationships

Lessons

Notes:
In this lesson, we will learn:
  • Application of Supplementary Angles
  • Complementary Angles on Polygons
  • Application of Complementary Angles
  • Proving Vertical Angles Using Supplementary Angles
  • Application of Vertical Angles
  • Understanding Adjacent Angles
  • Finding Adjacent Angles

Notes:
  • Supplementary angles: two angles which add up to 180°, don't necessarily have to be together.
  • Complementary angles: two angles which add up to 90°, again, don't necessarily have to be together.
  • The "S" of Supplementary stands for "straight", and there are 180° on a straight line.
  • The "C" of Complementary stands for "corner", and there are 90° at a corner.
  • Vertical angles: angles opposite each other are the same when two lines cross
  • Adjacent angles: two angles sharing a common side and vertex, yet they do not overlap.
  • Intro Lesson
    Introduction to Supplementary, Complementary, Vertical, and Adjacent Angles
  • 2.
    Complementary Angles on Polygons MATH7 17 1 2

    Which of the following pair(s) is/are complementary angles?

  • 3.
    MATH7 17 1 3

    Which of the following pair(s) is/are complementary angles?

  • 7.
    MATH7 17 1 7

    Given that ∠AOC\angle AOC=125° and ∠DOE\angle DOE=35°.

  • 9.
    Understanding Adjacent Angles

    What of the following is/are adjacent angles?

  • 10.
    Finding Adjacent Angles MATH7 17 1 10

    ∠AOB\angle AOB=30°, ∠AOC\angle AOC=100°.

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Angle relationships

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