Semester Rev. #1 - Lines, Rays, & Planes

Front

What is a line?

Back

A line is a straight one-dimensional figure that extends infinitely in both directions with no endpoints.

Front

What is a ray?

Back

A ray is a part of a line that starts at a point and extends infinitely in one direction.

Front

What is a plane?

Back

A plane is a flat two-dimensional surface that extends infinitely in all directions.

Front

What does it mean for points to be collinear?

Back

Collinear points are points that lie on the same straight line.

Front

What does it mean for points to be coplanar?

Back

Coplanar points are points that lie on the same plane.

Front

How do you denote a line using two points?

Back

A line can be denoted by any two points on it, for example, line AB.

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 the notation for a ray?

Back

A ray is denoted by its starting point and another point on the ray, for example, ray AB starts at A and passes through B.

Front

If A, B, and C are collinear and AB = 4 and BC = 2, what is AC?

Back

AC = AB + BC = 4 + 2 = 6.

Front

What is the significance of naming lines?

Back

Naming lines helps in identifying and referencing them in geometric problems.