Shapes and Designs Vocabulary Words Study Guide
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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| triangle | three sides
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| quadrilateral | four sides
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| pentagon | five sides
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| hexagon | six angles and six sides
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| heptagon | seven sides
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| octagon | eight sides
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| nonagon | nine sides
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| decagon | ten sides
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| equilateral triangle | triangle with all equal sides
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| straight angle | an angle with 180°
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| degrees | a unit of measurement
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| right angle | an angle of 90°
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| ray | a line from a point that goes on forever in one direction from that point
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| acute angle | an angle of less than 90°
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| vertex | the intersection of two sides of a plane figure to form an angle
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| isosceles triangle | a triangle with two equal sides
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| obtuse angle | an angle greater than 90° but less than 180°
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| scalene triangle | a triangle with no equal sides
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| parallelogram | a quadrilateral having both pairs of opposite sides parallel to each other
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| rotation symmetry | when you rotate (or turn) a figure around a center point by fewer than 360°
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| reflection symmetry | two halves that are mirror-images of each other
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| regular polygon | a polygon which all angles are congruent and all sides have the same length
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| irregular polygon | have sides of differing lengths and angles of differing measure
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| parallel lines | are lines that never intersect
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| transversal | a line that passes through two or more lines
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| tiling | laying down shapes in a pattern
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| square | a rectangle having all four sides of equal length
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| rectangle | A parallelogram with four right angles.
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| line | a straight figure that is 180° and goes on forever
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| dodecagon | 12 sides
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| line segment | a line that has two end points
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
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Created by:
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