Eureka Math Grade 4 Module 4 Topic A Flashcard

Front

What is the name of the tool we use to measure angles?

Back

Protractor

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

How many degrees are in a full circle?

Back

360 degrees.

Front

What are perpendicular lines?

Back

Lines that intersect at a right angle (90 degrees).

Front

What are intersecting lines?

Back

Lines that cross each other at any angle.

Front

What are parallel lines?

Back

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

Front

What is an angle?

Back

A figure formed by two rays with a common endpoint called the vertex.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.