multiply length and width,then width and height,then height and width then add your answers together the double it.
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rectangle and octahedron
Rectangle Surface Area: L X W X 6 (the number of sides)
You find the area of each face and add the results together.
Yes, LxW=Area. For Surface Area, add up the area of all the sides
Well, darling, to find the area of a rectangle, you simply multiply the length by the width. So, for a 7cm by 9cm rectangle, the area would be 63 square centimeters. Easy peasy lemon squeezy!