Angle Side Relationships

Front

What is an angle?

Back

An angle is formed by two rays that share a common endpoint, called the vertex.

Front

What is the relationship between angles and sides in a triangle?

Back

In a triangle, the largest angle is opposite the longest side, and the smallest angle is opposite the shortest side.

Front

What is a triangle?

Back

A triangle is a three-sided polygon.

Front

What are the types of angles?

Back

The types of angles are acute (less than 90°), right (exactly 90°), and obtuse (greater than 90° but less than 180°).

Front

What is the sum of angles in a triangle?

Back

The sum of the angles in a triangle is always 180°.

Front

What is the largest angle in a triangle?

Back

The largest angle in a triangle is opposite the longest side.

Front

What is the smallest angle in a triangle?

Back

The smallest angle in a triangle is opposite the shortest side.

Front

What is a ray?

Back

A ray is a part of a line that starts at a point and extends infinitely in one direction.

Front

What is a vertex?

Back

A vertex is the point where two rays meet to form an angle.

Front

What is a side of a triangle?

Back

A side of a triangle is one of the three line segments that form the triangle.