Basic Geometric ElementsPoint

Line

Line segment

Ray

Parallel lines

Intersecting lines

Perpendicular

Angles

Vertex

Sides

Geometry

PointAn exact location in space

LineAn endless collection of points along a straight path

Line segmentPart of a line that has two endpoints

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Geometry

Ray

Part of a line that has one endpoint and extends endlessly in the other direction.

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Geometry

Parallel LinesLines do not intersect but are in the same plane

Intersecting LinesLines meet at one point

Perpendicular LinesLines form a right angle

Angles

An angle is formed when two rays have the same endpoint.

This endpoint is called the vertex.

The two rays that form the angle are called sides.

Angles

There are four types of anglesRight angle

Straight angle

Acute angle

Obtuse angle

Right Angles

Forms a square corner

Forms a 90 degree angle.

90 degrees

Straight Angle

Forms a straight line

Angle is 180 degrees

180 degrees

Acute Angles

Forms an angle that is less than a right angle

Angle is less than 90 degrees

Obtuse Angles

Form an angle that is more than a right angle

Angle is more than 90 degrees