Geometry Unit 2Vocabulary

A starting point and all points on a line continuing in one direction only

Ray

Three or more points on the same line

Collinear

Angles that are next to each other They share a common vertex and have a

common side

Adjacent Angles

Used to calculate the distance between 2 points on a grid

Distance Formula

Cuts a segment into 2 congruent parts Can be a point, a line or a ray

Segment Bisector

Ray that divides an angle into 2 congruent angles

Angle Bisector

If, then statement

Conditional Statement

Switching the “if” and “then” parts of a conditional statement

Conditional : If you’re at Olive Garden, then you’re family

Converse : If you’re family, then you’re at Olive Garden

Converse

A statement showing why an “if – then” statement isn’t always true

If it’s Nike, then Just Do It.

Counterexample

If and only if statement Conditional : If it’s fresh, then it’s Subway Biconditional : It’s fresh if and only if it’s

Subway

Biconditional

Angles formed when 2 lines intersect across from each other

Vertical Angles

Two adjacent angles that form a straight line

Linear Pair

Two angles whose measures add up to 90 degrees

Complementary

Two angles whose measures add up to 180 degrees and form a straight line

Supplementary