Geometry Test — Units 1 & 2.

Point

Exact location named with a capital letter.

Line

Goes forever in both directions and is named using 2 points.

Segment

Part of a line with 2 endpoints.

Ray

Has 1 endpoint and goes forever in one direction.

Plane

Flat surface that extends forever, usually named using 3 noncollinear points.

Collinear

Points that lie on the same line.

Coplanar

Points/lines that lie in the same plane.

Congruent segments

Segments with the same length, indicated by the symbol ≅.

Segment Addition Postulate

States that if B is between A and C, then AB + BC = AC.

Midpoint Formula

The formula to find the midpoint: (\left(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}\right)).

Distance Formula

The formula to find the distance: (d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}).

Perimeter

Distance around a figure.

Area of a Rectangle

Calculated with the formula A=LW.

Angle

Formed by two rays with a common endpoint called the vertex.

Complementary Angles

Two angles that add up to 90°.

Supplementary Angles

Two angles that add up to 180°.

Vertical Angles

Opposite angles formed by intersecting lines, which are always congruent.

Inductive Reasoning

Making general conclusions based on specific examples.

Deductive Reasoning

Reaching specific conclusions based on known facts or rules.

Postulate

A statement accepted as true without proof.

Addition Property of Equality

If (x=5), then (x+3=8).

Distributive Property

The property that states (a(b+c)=ab+ac).