Canadian Forces Aptitude Test (CFAT) Practice

What is the term used for a three-sided polygon?

1. Square

2. Circle

3. Triangle

4. Pentagon

The correct answer is: Triangle

The term used for a three-sided polygon is 'triangle.' A triangle is characterized by having three edges and three vertices. The classification of triangles can be further defined based on the lengths of their sides (such as equilateral, isosceles, and scalene) or their angles (such as acute, right, and obtuse). It is one of the fundamental shapes in geometry and serves as the simplest polygon that can exist. In contrast, a square is a four-sided polygon with equal sides and right angles, a circle is a round shape with no corners or edges, and a pentagon is a five-sided polygon. Understanding the properties and definitions of these shapes is essential in geometry, making 'triangle' the correct term for a three-sided polygon.