Lines, Rays, Angles

Front

What is an acute angle?

Back

An acute angle is an angle that is less than 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that is greater than 90 degrees but less than 180 degrees.

Front

What is a right angle?

Back

A right angle is an angle that is exactly 90 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that is exactly 180 degrees.

Front

What is a line?

Back

A line is a straight path that extends infinitely in both directions.

Front

What is a ray?

Back

A ray is a part of a line that has a fixed starting point and extends infinitely in one direction.

Front

What is a point?

Back

A point is a precise location in space that has no size or dimension.

Front

What does it mean for lines to be perpendicular?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees).

Front

How do you identify an acute angle in a diagram?

Back

An acute angle is identified by looking for an angle that is smaller than a right angle.

Front

How do you identify an obtuse angle in a diagram?

Back

An obtuse angle is identified by looking for an angle that is larger than a right angle.