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Anywhere Math
Polygons in the Coordinate Plane
You'll be ready to plot something after a lesson on coordinate geometry! The video instructor begins by discussing how to plot four points to create a quadrilateral. The second example demonstrates finding the area and perimeter from the...
CK-12 Foundation
Ck 12: Elem Math: Overview of Perimeter
[Free Registration/Login may be required to access all resource tools.] The video defines perimeter and uses a grid to count the perimeter of given shapes, followed by an example of adding the sides to find the perimeter.