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unit1 area/perimeter

polygon A closed, plane figure with segments for sides
sides The line segments that form a polygon
triangle A three-sided polygon
quadrilateral A four-sided polygon
pentagon A five-sided polygon
octagon An eight-sided polygon
perimeter Distance around a polygon
area The space on the surface of a polygon
rectangle A quadrilateral with equal (right) angles
parallelogram A quadrilateral with opposite sides parallel
vertex The point were two sides of a polygon meet
altitude The height of a polygon
trapezoid A quadrilateral with one set of parallel sides
regular polygon A polygon with sides equal in length and angles equal in measure
apothem The perpendicular distance from the center to a side of the regular polygon
circumference The distance around a circle
diameter Distance across the circle throught the center
radius The distance from the center to the edge of a circle
heptagon A seven-sided polygon
hexagon A six-sided polygon
decagon A ten-sided polygon
dodecagon A twelve-sided polygon
nonagon A nine-sided polygon
undecagon An eleven-sided polygon
ngon A polygon with n sides
Created by: mrswheat