Question

Triangle ABC is an obtuse triangle with the obtuse angle at vertex B. Angle A must be

less than 90°.
greater than 90°.
congruent to angle B.
congruent to angle C.

Answer 1

greater than 90°.

Explanation:

Answer 2

The answer would be the first choice, less than 90°.

Explanation:

The angles within a triangle add up to 180°. If an angle is obtuse in the triangle (greater than 90°), it is impossible for the other angles to be obtuse or equal to 90°.