# Sum of Interior Angles of a Triangle

Skill:

Use a variety of triangles, quadrilaterals, and other polygons to draw conclusions about the sum of the measures of the interior angles.

# Sum of Interior Angles of a Triangle

Discover the sum of the angle measures in any triangle in this activity.

### Putting It All Together

*Answer these open ended questions on your own or with others to form deeper math connections. *

### Open-ended question 1

If you move the point to change the original triangle, what happens to angle ?

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### Open-ended question 2

What is the sum of all the interior angles of a triangle?

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### Open-ended question 3

Do you think it is possible to have a triangle with angles 50°, 60°, and 80°? Explain.

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## Explore more

Prerequisite Resources

More from Angle Sum Properties of Triangles, Quadrilaterals, and Polygons

Next Resources