Question

2 which of the following is a triangle that has a 90 degree angle and two 45 degree angles? obtuse triangle, acute triangle, scalene triangle, right triangle

Explanation:

To determine the triangle type, we analyze the angle properties:

• An obtuse triangle has one angle > 90°, but here there's a 90° angle, so not obtuse.
• An acute triangle has all angles < 90°, but here there's a 90° angle, so not acute.
• A scalene triangle has all sides (and angles) of different lengths/measures. Here two angles are 45°, so two sides are equal, so not scalene.
• A right triangle is defined as a triangle with one 90° (right) angle. This triangle has a 90° angle and two 45° angles, so it fits the definition of a right triangle.

Answer:

D. Right triangle