[Massachusetts Comprehensive Assessment System (MCAS) Logo] Massachusetts Comprehensive Assessment System Grade 5 Mathematics Reference Sheet PERIMETER (P) FORMULAS perimeter equals distance around square . . . . . . . . . . .[P equals four multiplied by s] (s equals length of a side) rectangle . . . . . . . . .[P equals two multiplied by l plus two multiplied by w] (l equals length; w equals width) triangle . . . . . . . . . .[P equals a plus b plus c] (a, b, and c are the lengths of the sides) AREA (A) FORMULAS square . . . . . . . . . . .[A equals s multiplied by s] (s equals length of a side) rectangle . . . . . . . . .[A equals l multiplied by w] (l equals length; w equals width) triangle . . . . . . . . . .[A equals one half multiplied by b multiplied by h] (b equals length of the base; h equals height) VOLUME (V) FORMULAS rectangular prism . . . . .[V equals l multiplied by w multiplied by h] (l equals length; w equals width; h equals height) cube . . . . . . . . . . . . . . . .[V equals s multiplied by s multiplied by s] (s equals length of an edge)