Geometry Test #2

Circle

A closed curve in a plane where all points are equally distant from a fixed point called the center.

Circumference

The perimeter of a circle.

Semicircle

One half of a circle.

Diameter

A line through the center with its ends on the circle.

Radius

A line joining the center with any point on the circle.

Chord

Any straight line whose ends are on the circle.

Arc

Any portion of a circle.

Quadrant

The arc which represents a quarter of a circle.

Congruence

Two plane figures are congruent if they have the same size and shape.

Corresponding parts

The angles and sides that match.

Axiom

A general statement accepted without proof to be true.

Postulate

A geometric assumption accepted without proof to be true.

Proof

The process of deductive reasoning whereby the truth of a theorem or correctness of a construction is established.

Given

A statement of beginning facts.

Prove

What is to be shown true.

Analysis

Planning and reasoning to discover how to solve a proof.

Proof

Logically arranged steps leading to the conclusion.

Corollary

Another geometric statement that is easily deduced from the given theorem.