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Geometry Terms

3rd Grade Geometry Terms

TermDefinition
2-dimensional shapes shapes that have only 2 dimensions (width and height) but no thickness; flat shapes: plane figures
acute angle angles that are smaller than a right (90 degree) angle
attributes properties, characteristics, or qualities of an object
properties attributes, characters or qualities that something has
congruent the same size and the same shape (equal or equivalent)
polygon simple closed plane shape (2-dimensional) with all straight sides
obtuse angle angle that is larger than a right (90 degree) angle
parallel lines always the same distance apart, never touching
parallelogram a quadrilateral that has exactly two pairs of parallel sides
quadrilateral polygon with exactly 4 sides
right angle angle with exactly 90 degrees; perpendicular
square parallelogram with right angles and all sides congruent (equal)
rectangle a parallelogram with right angles
rhombi parallelogram with all congruent (equal) sides
plane figure a 2-dimensional shape
trapezoid a quadrilateral with exactly only one pair of parallel sides
Created by: MrP7
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