Basics of Geometry Vocabulary

Which of the following are undefined terms in Geometry?

• Point

• Angle

• Plane

• Line

• Sphere

Tags

CCSS.4.G.A.1

A place. A dot on the coordinate plane.

• Point

• Line

• Plane

• Angle

Has at least two points and extends infinitely. Normally has two arrows at the end.

• Angle

• Ray

• Line

• Plane

Tags

CCSS.4.G.A.1

Has one initial point and continues in one direction.

• Endpoint

• Line

• Circle

• Ray

Tags

CCSS.4.G.A.1

Two rays with the same initial point, called the vertex.

• Angle

• Line

• Intersection

• Ray

Tags

CCSS.4.G.A.1

An angle that is exactly 90^o.

• Straight Angle

• Obtuse Angle

• Right Angle

• Acute Angle

Tags

CCSS.4.G.A.1

An angle greater than 90^o and less than 180^o.

• Straight Angle

• Obtuse Angle

• Right Angle

• Acute Angle

Tags

CCSS.4.G.A.1

A point in the exact middle of the two endpoints of a line segment

• Segment bisector

• Midpoint

• Angle bisector

• Linear pair

Tags

CCSS.HSG.GPE.B.6

A line that splits an angle into two congruent angles

• Segment bisector

• Midpoint

• Angle bisector

• Linear pair

Tags

CCSS.HSG.CO.C.9

Flat surface. Has at least 3 non-collinear points.

• Line

• Plane

• Point

• Ray

Tags

CCSS.4.G.A.1