Question

Sally states that a triangle can only have one obtuse or right angle. However, a triangle must have at least two acute angles. Is Sally correct? Explain.

Answer 1

She is correct because the sum of the measures must add up to 180 degrees. If a triangle had more than one right or obtuse angle, then the sum of the measures would be over 180 degrees.

This is a shorter and different version from the sample response.

Incase you were wondering this works too.

Hope this helps!!!

Answer 2

Sally is correct. The sum of the measures of the three interior angles must add up to 180 degrees. If a triangle had more than one right or obtuse angle, then the sum of the measures would be over 180 degrees. So two of the angles must be acute.

This is the correct answer.