In a triangle, if two angles are 50° and 60°, what is the third angle?

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Prepare for the Certify Teacher EC-6 (391) Mathematics Exam. Utilize multiple choice questions, flashcards, and explanations to excel in your assessment. Gear up for success!

Multiple Choice

In a triangle, if two angles are 50° and 60°, what is the third angle?

Explanation:
The sum of the angles in any triangle is 180 degrees. Add the two given angles: 50° + 60° = 110°. The remaining angle must make the total 180°, so 180° − 110° = 70°. Therefore the third angle is 70°. If the third angle were 60°, 80°, or 50°, the total would be 170°, 190°, or 160°, respectively, which isn’t possible for a triangle.

The sum of the angles in any triangle is 180 degrees. Add the two given angles: 50° + 60° = 110°. The remaining angle must make the total 180°, so 180° − 110° = 70°. Therefore the third angle is 70°. If the third angle were 60°, 80°, or 50°, the total would be 170°, 190°, or 160°, respectively, which isn’t possible for a triangle.

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