4.G.1 Review

Front

What is an acute angle?

Back

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

Front

What is an obtuse angle?

Back

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

Front

What is a right angle?

Back

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

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

What are perpendicular lines?

Back

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

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 line segment?

Back

A line segment is a part of a line that has two endpoints.

Front

How do you identify an acute angle in a diagram?

Back

An acute angle is identified by its measure being less than 90 degrees, often appearing sharp or pointy.

Front

How do you identify an obtuse angle in a diagram?

Back

An obtuse angle is identified by its measure being more than 90 degrees, often appearing wider.

Front

What is the sum of angles in a triangle?

Back

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