plane figure

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Related to plane figure: solid figure
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Noun1.Plane figure - a two-dimensional shapeplane figure - a two-dimensional shape    
figure - a combination of points and lines and planes that form a visible palpable shape
heart - a plane figure with rounded sides curving inward at the top and intersecting at the bottom; conventionally used on playing cards and valentines; "he drew a heart and called it a valentine"
polygon, polygonal shape - a closed plane figure bounded by straight sides
conic, conic section - (geometry) a curve generated by the intersection of a plane and a circular cone
oblong - a plane figure that deviates from a square or circle due to elongation
hemicycle, semicircle - a plane figure with the shape of half a circle
sector - a plane figure bounded by two radii and the included arc of a circle
star - a plane figure with 5 or more points; often used as an emblem
paraboloid - a surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis
ellipsoid - a surface whose plane sections are all ellipses or circles; "the Earth is an ellipsoid"
tree diagram, tree - a figure that branches from a single root; "genealogical tree"
References in classic literature ?
The shadow then of tyrannical pleasure determined by the number of length will be a plane figure.
A hexagon is a plane figure with how many sides and angles?
The topics include integration using trigonometric identities, integration by parts, the fundamental theorems of calculus, applying the definite integral to compute the area of a plane figure, and methods of solving ordinary differential equations of the first order and of the first degree.
What geometric plane figure is presented by ice crystals and snowflakes?