Question

Classify a triangle with angle measures of 35 degrees and 45 degrees.

Acute
Obtuse
Right
Not Possible

Answer 1

Obtuse

Explanation:

The two angles given are acute angles whose sum is 80°. The third angle of the triangle makes the sum of all angles be 180°, so its measure must be 100°. An angle with a measure of more than 90° is an obtuse angle, so this triangle has two acute angles and an obtuse angle.

Any triangle that contains an obtuse angle is an obtuse triangle.