Start by learning how to calculate the perimeter and area of squares, rectangles, and triangles. Note the explanation of why perimeter measurements are in meters and area measurements are in square meters.
Area and Perimeter - Khan Academy is a free educational video by Khan Academy.It helps students in grades 9,10,11,12 practice the following standards HSG.GPE.B.7.
1. HSG.GPE.B.7 : Use coordinates to compute perimeters of polygons and areas of triangles and rectangles, e.g., using the distance formula..