# Lisa_Geometrical terms

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Education

Published on December 1, 2008

Author: lisamahon

Source: authorstream.com

Slide 1: Geometrical terms By Lisa Mahon Slide 2: Point A indicates a position in space. Point .A Slide 3: The line EF is infinite in length Line E F Slide 4: The interval PQ is part of a line. P Q Interval Slide 5: EF is a vertical line. Horizontal and vertical lines C D E F CD is a horizontal line. Slide 6: Right angle An angle of 90° between 2 lines. Right angle symbol Slide 7: Perpendicular lines Perpendicular lines are at right angles (90°) to each other. This is written as CD  EF. C D E F Slide 8: Straight angle A straight angle (or half a revolution) measures 180°. Slide 9: Complete revolution A complete revolution measures 360°.

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