Grade 4 Lines and Angles Flashcard

Front

What are the different types of lines?

Back

Line, Line segment, Parallel, Perpendicular

Front

What are the properties of parallel lines?

Back

Different length and never intersect

Front

What is less than 90 degrees?

Back

Acute Angle

Front

What are the properties of perpendicular lines?

Back

Intersect at a 90-degree angle

Front

What is a ray?

Back

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

Front

What is a line segment?

Back

A part of a line that has two endpoints.

Front

What is a straight angle?

Back

An angle that measures exactly 180 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What are intersecting lines?

Back

Lines that cross each other at one point.