Geometry Terms 1.4-1.5

A part of a line with one endpoint that extends infinitely in one direction

• Opposite Rays

• Ray

• Vertex

• Angle

two collinear rays with a common endpoint that extend in opposite directions

• Right Angle

• Sides

• Opposite Rays

• Linear Pair

a figure formed by two noncollinear rays with a common endpoint

• Degrees

• Angle

• Straight Angle

• Complimentary Angles

Tags

CCSS.4.G.A.1

CCSS.4.MD.C.5

CCSS.4.MD.C.7

the common endpoint of the sides of an angle

• Vertex

• Obtuse Angle

• Midpoint

• Sides

Tags

CCSS.4.G.A.1

CCSS.4.MD.C.5

the unit of measure for an angle

• Angle

• Vertex

• Degrees

• Length

Tags

CCSS.4.MD.C.5

CCSS.4.MD.C.6

an angle whose measure is less than 90 degrees

• Complimentary Angle

• Right Angle

• Supplementary Angle

• Acute Angle

Tags

CCSS.4.G.A.1

an angle whose measure is exactly 90 degrees

• Straight Angle

• Right Angle

• Obtuse Angle

• Angle Bisector

Tags

CCSS.4.G.A.1

CCSS.4.MD.C.5

CCSS.4.MD.C.6

an angle whose measure is greater than 90 degrees

• Right Angle

• Complimentary Angle

• Adjacent Angle

• Obtuse Angle

Tags

CCSS.4.G.A.1

CCSS.4.MD.C.5

An angle whose measure is 180 degrees

• Vertical Angle

• Straight Angle

• Right Angle

• Angle Addition Postulate

If point D is in the interior of <ABC, then m<ABD + m<DBC = m<ABC

• Angle Addition Postulate

• Angle Bisector

• Linear Pair

• Midpoint