Angles

Front

What is an angle?

Back

An angle is formed when two lines meet at a point, called the vertex.

Front

What is a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is an acute angle?

Back

An acute angle measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle measures more than 90 degrees but less than 180 degrees.

Front

How many degrees are in a full circle?

Back

There are 360 degrees in a full circle.

Front

What is the vertex of an angle?

Back

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

Front

What is a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

What is a reflex angle?

Back

A reflex angle measures more than 180 degrees but less than 360 degrees.

Front

Can an angle be negative?

Back

No, angles are always measured as positive values.

Front

What is the sum of angles in a triangle?

Back

The sum of angles in a triangle is always 180 degrees.