Points, Lines, Segments, Rays, Planes, Angles

Front

What is a point?

Back

A point is a precise location or position in a two-dimensional or three-dimensional space. It has no size, area, length, or any other dimensional attribute.

Front

What is a line?

Back

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

Front

What is a line segment?

Back

A line segment is a part of a line that is bounded by two distinct endpoints. It has a definite length.

Front

What is a ray?

Back

A ray is a part of a line that starts at a point (the endpoint) 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. It has no thickness.

Front

What is an angle?

Back

An angle is formed by two rays (the sides of the angle) that share a common endpoint (the vertex).

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.