Section: Mathematics Knowledge

21) Which of these statements is true for two obtuse angles?

1. The sum of the two angles will always be greater than 180°
2. The sum of the two angles will always be equal to 180°
3. The sum of the two angles will always be less than 180°
4. Two obtuse angles can make a triangle.

An obtuse angle is one that is greater than 90° and less than 180°. (B) and (C) cannot be true as two minimal obtuse angles would be greater than 180°. (D) cannot be an answer as all three angles in a triangle are equal to 180°. If there are two obtuse angles, the sum of these two would exceed this. Therefore (A) is the only option available.