Grade 4 - Shape and Space
Standard 4.SS.3 - Find the area of a shape using unit squares.
Included Skills: Geometry
Demonstrate an understanding of area of regular and irregular 2-D shapes by: • recognizing that area is measured in square units. • selecting and justifying referents for the units cm² or m². • estimating area, using referents for cm² or m². • determining and recording area (cm² or m²). • constructing different rectangles for a given area (cm² or m²) in order to demonstrate that many different rectangles may have the same area. • Describe area as the measure of surface recorded in square units. • Identify and explain why the square is the most efficient unit for measuring area. • Provide a referent for a square centimetre, and explain the choice. • Provide a referent for a square metre, and explain the choice. • Determine which standard square unit is represented by a given referent. • Estimate the area of a given 2-D shape, using personal referents. • Determine the area of a regular 2-D shape, and explain the strategy. • Determine the area of an irregular 2-D shape, and explain the strategy. • Construct a rectangle for a given area. • Demonstrate that many rectangles are possible for a given area by drawing at least two different rectangles for the same given area.