## Standards with the same topic and subject but for other grades

The student will estimate and a) measure the distance around a polygon in order to determine its perimeter using U.S. Customary and metric units; and b) count the number of square units needed to cover a given surface in order to determine its area.

Opportunities to explore the concepts of perimeter and area should involve hands-on experiences (e.g., placing toothpicks (units) around a polygon and counting the number of toothpicks to determine its perimeter and filling or covering a polygon with tiles (square units) and counting the tiles to determine its area).

measure the distance around a polygon in order to determine its perimeter using U.S. Customary and metric units; and

count the number of square units needed to cover a given surface in order to determine its area.

Area is the number of iterations of a two-dimensional unit needed to cover a surface. The two-dimensional unit is usually a square, but it could also be another shape such as a rectangle or an equilateral triangle.

Perimeter and area should always be labeled with the appropriate unit of measure.

Perimeter is the path or distance around any plane figure.

The unit of measure used to find the perimeter or area is stated along with the numerical value when expressing the perimeter or area of a figure (e.g., the perimeter of the book cover is 38 inches and the area of the book cover is 90 square inches).

Estimate and use U.S. Customary and metric units to measure the distance around a polygon with no more than six sides to determine the perimeter. (a)

Determine the area of a given surface by estimating and then counting the number of square units needed to cover the surface. (b)