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5th grade 2D Vocab

TermDefinition
polygon closed, flat shape with only straight lines
quadrilateral polygon with 4 sides
pentagon polygon with 5 sides
hexagon polygon with 6 sides
octagon polygon with 8 sides
triangle polygon with 3 sides
rectangle quadrilateral with 4 right angles
rhombus quadrilateral with 4 equal sides
square quadrilateral with 4 right angles and 4 equal sides
parallelogram quadrilateral with 2 pair of parallel lines
trapezoid quadrilateral with 1 pair of parallel lines
right angle angle that measures 90 degrees
acute angle angle that measure less than 90 degrees
obtuse angle angle that measures greater than 90 degrees
parallel lines 2 lines that run side by side and will never touch
scalene triangle triangle with 0 equal sides
isosceles triangle triangle with 2 or more equal sides
equilateral triangle triangle with 3 equal sides
acute triangle triangle with 3 acute angles
obtuse triangle triangle with 1 obtuse angle
right triangle triangle with 1 right angle
Created by: barri.brewer
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