FTCE General Knowledge Math Practice Test

What type of triangle has three acute angles?

1. Obtuse triangle

2. Right triangle

3. Scalene triangle

4. Acute triangle

The correct answer is: Acute triangle

An acute triangle is defined as a triangle in which all three angles are acute, meaning each angle is less than 90 degrees. This characteristic distinguishes acute triangles from other types of triangles. In comparison, an obtuse triangle contains one angle that is greater than 90 degrees. A right triangle features one angle that is exactly 90 degrees. A scalene triangle can have any combination of angles and side lengths, but it does not specifically define the angles as all being less than 90 degrees. Thus, the identification of an acute triangle as one with three acute angles is accurate and highlights its specific properties. Understanding these distinctions helps clarify the classification of triangles based on their angle measures.