Grade 4 - Measurement and Data
Standard 4.MD.A.3 - Find the cost of materials based on the perimeter or area in a word problem.
Included Skills: Geometry
Apply the area and perimeter formulas for rectangles in real world and mathematical problems. For example, find the width of a rectangular room given the area of the flooring and the length, by viewing the area formula as a multiplication equation with an unknown factor.