Dec 3 Core 2 Geometry Basics

Front

What is a plane in geometry?

Back

A flat surface that extends infinitely in all directions.

Front

What is a line segment?

Back

A part of a line that has two endpoints and all the points in between.

Front

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

Back

A line extends infinitely in both directions, while a line segment has two endpoints.

Front

What is a ray in geometry?

Back

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

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.

Front

What is an acute angle?

Back

An angle that measures less than 90 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 plane containing a point?

Back

A plane that includes a specific point along with all the lines and angles that can be drawn through that point.

Front

What is the notation for a line?

Back

A line is usually denoted by two points on the line, such as line AB.