Unit 1 - Foundations of Geometry Vocabulary

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Radical Expression

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A mathematical expression that includes a square root, cube root, or other root.

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Root/Index

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The number that indicates the degree of the root in a radical expression.

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Radicand

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The number or expression inside a radical symbol.

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Coefficient

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A numerical or constant quantity placed before and multiplying the variable in an algebraic expression.

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Undefined Terms

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Basic figures in geometry that cannot be defined by using other figures. Examples include point, line, and plane.

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Point

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An exact location in space with no size, only position.

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Line

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A straight one-dimensional figure having no thickness and extending infinitely in both directions.

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Plane

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A flat, two-dimensional surface that extends infinitely far.

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Line Segment

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A part of a line that is bounded by two distinct end points.

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Ray

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A part of a line that starts at a point and extends infinitely in one direction.