Lisa_Geometrical terms

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Slide 1: 

Geometrical terms By Lisa Mahon

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Point A indicates a position in space. Point .A

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The line EF is infinite in length Line E F

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The interval PQ is part of a line. P Q Interval

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EF is a vertical line. Horizontal and vertical lines C D E F CD is a horizontal line.

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Right angle An angle of 90° between 2 lines. Right angle symbol

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Perpendicular lines Perpendicular lines are at right angles (90°) to each other. This is written as CD  EF. C D E F

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Straight angle A straight angle (or half a revolution) measures 180°.

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Complete revolution A complete revolution measures 360°.