46 Geometry words
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Acute Angle | An angle that is smaller than 90 digrees.
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Angle | The figure formed by two rays that meet at a common endpoint.
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Center | A point from which every point on a circle is the same distance.
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Circle | Asimple closed curve;all the points on the circle are the same distance from the center point.
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Congruent Figures | Figures that have same size and shape.
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Degree | A unit used to measure angles.
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Diameter | A line segment that passes through the center of a circle and has both end points on a circle.
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Edge | The line segment where two faces of a soild figure meet.
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equilateral Triangle | Atriangle whose three sides are congruent.
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End Point | The point at the end of a line segment or ray.
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Intersecting Line | Lines that meet or cross at a common point.
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Isosceles Triagle | Atriangle with at least two sides that are equal in length
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Line | A straight set of points that go on forever in opposite directions.
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Obtuse Angle | An angle that measures more than 90 digrees but less than 180.
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Half- turn symmetery | A figure that matches its image when its image when it is turned halfway around has half-turn symmetry.
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Rectangular Prism | A solid figure with six rectangular faces.
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Slide (translation) | The movement of a figure aloung a line without changing direction
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Ray | The part of a line that starts at an endpoint and goes on forever in one direction
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Rectangle | A parallelogram with four right angles
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Perpendicular lines | Intersecting lines in the same plane that form four right angles
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Line Segment | The part of a line between two endpoints
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Radius | A line segment with endpoints at the center of a circle and on the circle
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Straight Angle | An angle that measures 180 digrees
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Trapezoid | A quadrillateral with exactly one pair of parallel sides
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SimilarFigures | Figures that have the same shape.They may or may not be the same size
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Vertex | A common endpoint of two rays or line segment.In a soild figure,the point at witch three or more edges meet
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Perimeter | The distince around a shape
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Square | A parallelogram that has four right angles and four congruent sides
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Rhombus | An angle that measures 90 digrees.Itforms a square corner
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Volume | The number of cubic units needed to fill a soild figure
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Square Pyramid | A pyramid with a square base
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Area | The number of square units needed to cover a flat surface
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Quadrillateral | Any four-sided polygon
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Sphere | A solid figure that is shaped like a ball
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Parallelogram | A quadrilateral whoose opposite sides are parallel and congruent
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Turn | The movement of a figure around a point
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Scalene Triangle | A triangle with no sides that are equal
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Point | An exact location in space
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Triangle | A polygon with three sides
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Parallel lines | Lines in the same plane that never intersect
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Polygon | A simple closed flat figure made up of three or more line segment
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Tiangular Prism | A soild figure with two parallel triangular faces
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Plane | A flat surface that extends indefinitely in all directions
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Right Triangle | A triangle that has one right angle
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Protractor | The tool used to measure angles
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