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Measuring the Angles of Triangles: 180 Degrees

Instructions:

Choose an answer and hit 'next'. You will receive your score and answers at the end.

question 1 of 3

The interior angles of a triangle will always add up to what?

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1. A triangle has two angles that measure 15° and 25°. What is the measurement of the third angle?

2. A triangle has two angles that measure 21° and 54°. What is the measurement of the third angle?

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About This Quiz & Worksheet

Triangles all contain three angles. In this quiz, you'll apply what you've learned and find multiple angle measurements in given triangles.

Quiz & Worksheet Goals

This triangle quiz tests your ability to:

  • Know what the angles of a triangle add up to
  • Calculate an angle when given a triangle's other two angle measurements

Skills Practiced

  • Reading comprehension - ensure that you draw from the most important information from the lesson on measuring a triangle's angles
  • Problem solving - use this information to find an angle measurement when given the first two
  • Information recall - remember the knowledge you've gained about measuring the angles of a triangle
  • Knowledge application - use this knowledge to successfully answer questions involving angle measurements

Additional Learning

Still want to know more? The lesson Measuring the Angles of Triangles: 180 Degrees covers the following objectives:

  • Define triangle
  • Provide the formula for calculating the angles of triangles
  • Show examples of how to apply this formula to find a missing angle
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