1-5 Angles & Planes SG

Opposite Rays

Rays that have the same endpoint and extend in opposite directions.

Ray

Part of a line that consists of one endpoint and extends in one direction (With endpoint 1st & arrow always facing to the right).

How many points are required to make ONE plane?

Through any THREE noncollinear points, there is exactly ONE plane. (Any three non-collinear POINTS are COPLANAR)

What are examples angles can be named as?

by the vertex, # inside the angle, or any three letters on the angle AS LONG AS THE VERTEX IS THE MIDDLE LETTER // EX:

obtuse

more than 90 degrees, but less than 180

What is equal?

Angles with the same degree measures (Numbers) are EQUAL angles.

What is congruent?

Angles with the same measure (WITHOUT A NUMBER OF DEGREES) are congruent angles.

Adjacent Angles

Share a common side and a common vertex

Linear Pair

A pair of adjacent angles whose non common sides are opposite rays

Linear Pair Postulate

If two angles for a linear pair, then they are supplementary.

Bisect

A cut or divide into two equal or nearly equal parts

Angle Bisector

A ray that divides an angle into two equal angles