Naming Angles

Front

What is the angle formed by RAYS ED and EF called in long form?

Back

∠FED

Front

What is the vertex of the angle formed by RAYS ED and EF?

Back

E

Front

Which letter represents the vertex in the angle?

Back

B

Front

If I wanted to name the red angle, which of these options would be acceptable?

Back

∠HLG

Front

How is this angle written?

Back

∠ABC

Front

What is the definition of an angle?

Back

An angle is formed by two rays with a common endpoint called the vertex.

Front

What is a ray in geometry?

Back

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

Front

What does the term 'vertex' refer to in an angle?

Back

The vertex is the point where the two rays of the angle meet.

Front

How do you denote an angle using letters?

Back

An angle is denoted by three points, with the vertex in the middle, e.g., ∠ABC.

Front

What is the difference between acute, right, and obtuse angles?

Back

Acute angles are less than 90°, right angles are exactly 90°, and obtuse angles are greater than 90° but less than 180°.