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Chapter 12-5th Grade

Perimeter and Area

centimeter (cm) A metric unit of length. 100 centimeters equal 1 meter.
millimeter (mm) A metric unit of length. 1,000 millimeters equal 1 meter.
kilometer (km) A metric unit of length. One kilometer is equal to 1,000 meters.
meter (m) A metric unit of length. One meter is equal to 1,000 millimeters.
formula A rule that uses symbols.
perimeter The distance around the outside of any polygon.
base The side of a polygon to which the height is perpendicular.
area The number of square units needed to cover a surface or fi gure.
circle A closed plane fi gure made up of all the points that are the same distance from a given point.
height The length of a segment from one vertex of a polygon perpendicular to its base.
radius Any line segment that connects the center of a circle to a point on the same circle.
center The point from which all points in a circle are equally distant.
Created by: rhondacarlton



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