Eureka Math Grade 4 Module 4 Topic A Flashcard

Front

What are intersecting lines?

Back

Lines that cross each other at one point.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What are perpendicular lines?

Back

Lines that intersect to form right angles.

Front

What is an obtuse angle?

Back

An angle that is larger than 90 degrees but less than 180 degrees.

Front

What is a line?

Back

A straight path that extends infinitely in both directions.

Front

What is a line segment?

Back

A part of a line that has two endpoints.

Front

What is a ray?

Back

A part of a line that has one endpoint and extends infinitely in one direction.

Front

What are parallel lines?

Back

Lines that never intersect and are always the same distance apart.

Front

What is an acute angle?

Back

An angle that is smaller than 90 degrees.

Front

How do you identify perpendicular lines in a diagram?

Back

Look for two lines that meet to form a right angle.