Question

In an obtuse-angled triangle, what can be said about the angles?

Options

• All angles are less than 90°

• One angle equals 90°

• One angle is greater than 90° and the other two are acute

• Two angles are greater than 90°

Answer 1

One angle is greater than 90° and the other two are acute

Explanation:

An obtuse-angled triangle has one obtuse angle (greater than 90°) and the other two angles must be acute to satisfy the angle sum property of triangles.