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Terms in this set (26)
hexagon
a polygon with six sides and angles
equilateral triangle
a triangle with all three sides the same length
isosceles triangle
a triangle with two sides the same length
octagon
a polygon with eight sides
parallelogram
a quadrilateral with opposite sides parallel
pentagon
a polygon with five sides
polygon
a closed figure with any number of straight sides
quadrilateral
a polygon with four sides
regular polygon
a polygon that has all sides and all angles equal
scalene triangle
a triangle with no sides the same length
square
a polygon with four equal sides and four right angles
triangle
a polygon with three sides
decagon
a polygon with ten sides
sides
the line segments in polygons
right triangle
a triangle with one 90 degree angle
diagonal
a line segment connecting opposite corners of a polygon
heptagon
a polygon with seven sides
irregular polygon
a polygon having sides with different lengths
nonagon
a polygon with nine sides
rhombus
a polygon with four sides that are all the same length
trapezoid
a polygon with four sides having one pair of parallel sides
rectangle
a polygon with four right angles and opposite sides parallel
hypotenuse
a line segment of a right triangle opposite the right angle
perimeter
the distance around the outside of a polygon
line of symmetry
a line that cuts a figure in half and when folded there are no gaps or overlaps
dodecagon
a polygon with twelve sides
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