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Geometry Review

Geometry - Vocabulary Review

plane A plane is a boundless surface in space. It has length, like a line; it also has width, but not thickness.
point A point is a way to describe a specific location in space. It is drawn by placing a single dot at the location you want to specify, and denoted in text with a capital letter.
line The infinite set of all points arrayed in a straight formation;has no thickness, it has only length.
poly word-forming element meaning "many, much,"
polygon a closed plane figure that is formed by three or more segments called sides.
vertex A point where two or more straight lines meet; a corner.
diagonal A straight line inside a shape that goes from one corner to another (but not an edge).
supplementary angles Two angles whose sum equals exactly 180 degrees.
complementary angles Two angles whose sum equals exactly 90 degrees.
right triangle A triangle with a right angle.
acute triangle A triangle with three acute angles.
obtuse triangle A triangle with one obtuse angle.
scalene triangle A triangle with differnt side lengths; no sides are equal.
equilateral triangle A triangle with all sides of equal length.
isosceles triangle A triangle with two sides of equal length.
quadrilateral A flat shape with four straight sides
parallelogram A quadrilateral with two pairs of parallel sides.
parallel lines Two lines on a plane that never meet; they're always the same distance apart.
straight angle An angle whose measure is exactly 180 degrees.
congruent Figures or solid shapes that have the same shape AND size.
vertical angles A pair of opposite angles that are formed from two intersecting lines; vertical angles are congruent.
Created by: swinsoa