Geometry Terms and Definitions

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Sufficient Condition

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Whenever a set of given conditions is enough to determine whether a figure is congruent, it is called a sufficient condition for the figure.

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Included Angle

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The angle of the polygon (triangle) whose vertex is the common point of two consecutive sides. The angle between two sides.

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Included Side

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The side of a polygon, specifically a triangle, which connects two angles. The side between the two angles.

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Overlapping Figures

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Figures which have interior points in common. They share at least one angle or side.

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Nonoverlapping Figures

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Figures or regions that do not share any interior points. No sides or angles in common.

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Right Triangle

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A triangle which has one right angle.

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Legs

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The two sides that form the right angle.

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Hypotenuse

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The longest side of a right triangle, the side opposite the right angle.

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Congruent Figures

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Two figures that are exactly equal in terms of shape and size.

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Similar Figures

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Figures that have the same shape but not necessarily the same size.