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On a piece of paper, use a protractor to construct a triangle with angle measures of 30° and 50º. What is the measure of the third angle?

1. 60°
2. 80°
3. 100°
4. 180°

Respuesta :

Sum of the angles of a triangle is 180 degrees.
100
50+30=80 you need 180 to have a full triangle so it would be 100

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