Math vocab.

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Cicumference

The distance around a circle

Radius

A line segment from he center of the circle to any point on the circle

Chord

A line segment with both endpoints on the circle

Diameter

A line segment that passes through the center of the circle With its endpoints on the circle

Central angle

With its vertex at the center of a circle

Arc

A segment of the circle

Semicircle

Half of a circle

Pi

The ratio of the circumference C of any circle to its diameter D

Surface area

The sum of the areas of all the faces of a solid

Net

A two dimensional pattern that you can fold to form a solid(three dimensional figure)

Volume

The measure of the amount of space a solid figure occupies( area of base x H)

Line

A series of points that extends in two opposite directions without ends

Line segment

Consist of two endpoints and all the points of the line between the endpoints

Ray

A line with a starting point, but no ending