Eureka Math Grade 4 Module 4 Topic A Flashcard

Front

How many degrees are in a full circle?

Back

360 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is larger than 90 degrees.

Front

What is a right angle?

Back

A right angle is exactly 90 degrees.

Front

What is an acute angle?

Back

An acute angle is smaller than 90 degrees.

Front

What is the difference between a line and a line segment?

Back

A line segment has two endpoints, while a line goes forever in both directions.

Front

What is a straight angle?

Back

A straight angle is exactly 180 degrees.

Front

What is a reflex angle?

Back

A reflex angle is larger than 180 degrees but less than 360 degrees.

Front

What is a vertical angle?

Back

Vertical angles are the angles opposite each other when two lines intersect.

Front

What is a complementary angle?

Back

Complementary angles are two angles that add up to 90 degrees.

Front

What is a supplementary angle?

Back

Supplementary angles are two angles that add up to 180 degrees.