Basic Geometry Concepts

Front

What is a point?

Back

A point shows an exact location in space. It has no size, only position.

Front

What is a line?

Back

A line is straight and goes on forever in both directions. It has no thickness, only length.

Front

What is a line segment?

Back

A line segment is part of a line with two endpoints. It has a fixed length.

Front

What is a ray?

Back

A ray starts at one point and goes on forever in one direction.

Front

What is an angle?

Back

An angle is formed where two rays meet at a common point, called the vertex.

Front

What is a right angle?

Back

A right angle measures exactly 90 degrees, like the corner of a square.

Front

What is an acute angle?

Back

An acute angle is less than 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a straight angle?

Back

A straight angle measures exactly 180 degrees, forming a straight line.

Front

What is a triangle?

Back

A triangle is a shape with three sides and three angles.