Exterior Angle Theorem: Definition & Formula


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question 1 of 3

What is the definition of the exterior angle theorem?

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1. What is the formula for the exterior angle theorem?

2. Solve for the missing exterior angle, n.

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About this Quiz & Worksheet

Test your ability to use the exterior angle theorem with this quiz and worksheet. You will have to identify the definition and formula of the exterior angle theorem, plug in given angles to calculate the exterior angle, and deduce the missing interior angles as well.

Quiz & Worksheet Goals

The assessments quiz you on topics like:

  • Recognizing the exterior angle theorem
  • Recalling the exterior angle formula
  • Solving for the missing exterior angle
  • Calculating missing interior angles

Skills Practiced

  • Problem solving - use acquired knowledge to find missing angles in practice problems
  • Defining key concepts - make certain that you can correctly define the exterior angle theorem
  • Information recall - use the knowledge you've attained regarding the measurement of a line

Additional Learning

To gather more information about finding missing angle measurements, check out the complementary lesson on the Exterior Angle Theorem. This lesson discusses the following concepts:

  • The definition of the exterior angle theorem
  • Application of the formula m<D = m<A + m<B
  • Visualization of a diagram with angles that are labeled
  • Methodology to solve a problem involving a triangle with missing angles