Definition that contains plane figure
- heart a plane figure with rounded sides curving inward at the top and intersecting at the bottom; conventionally used on playing cards and valentines
- side a line segment forming part of the perimeter of a plane figure
- star a plane figure with 5 or more points; often used as an emblem
- sector a plane figure bounded by two radii and the included arc of a circle
- diagonal connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face
- polygon a closed plane figure bounded by straight sides
- integrator a measuring instrument for measuring the area of an irregular plane figure
- centerline a line that bisects a plane figure
- oblong a plane figure that deviates from a square or circle due to elongation
- semicircle a plane figure with the shape of half a circle