- Types:
- show 29 types...
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isogon
an equiangular polygon
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convex polygon
a polygon such that no side extended cuts any other side or vertex; it can be cut by a straight line in at most two points
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concave polygon
a polygon such that there is a straight line that cuts it in four or more points
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quadrangle, quadrilateral, tetragon
a four-sided polygon
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triangle, trigon, trilateral
a three-sided polygon
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pentagon
a five-sided polygon
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hexagon
a six-sided polygon
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heptagon
a seven-sided polygon
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octagon
an eight-sided polygon
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nonagon
a nine-sided polygon
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decagon
a polygon with 10 sides and 10 angles
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undecagon
an eleven-sided polygon
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dodecagon
a twelve-sided polygon
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spherical polygon
a figure on the surface of a sphere bounded by arcs of 3 or more great circles
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reentering polygon, reentrant polygon
a polygon with one or more reentrant angles
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regular polygon
a polygon with all sides and all angles equal
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acute triangle, acute-angled triangle
a triangle whose interior angles are all acute
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equiangular triangle, equilateral triangle
a three-sided regular polygon
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isosceles triangle
a triangle with two equal sides
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oblique triangle
a triangle that contains no right angle
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obtuse triangle, obtuse-angled triangle
a triangle that contains an obtuse interior angle
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right triangle, right-angled triangle
a triangle with one right angle
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scalene triangle
a triangle with no two sides of equal length
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parallelogram
a quadrilateral whose opposite sides are both parallel and equal in length
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trapezium
a quadrilateral with no parallel sides
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trapezoid
a quadrilateral with two parallel sides
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regular hexagon
a hexagon with six sides of equal length
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spherical triangle
a spherical polygon formed by the arcs of 3 great circles
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cuneus, wedge, wedge shape
any shape that is triangular in cross section
