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7th Math Emma
Name of Formula | Formula |
---|---|
Area of a square | A=S^2 |
Area of a rectangle | bxh |
Area of a triangle | bxh/2 |
Area of a circle | pixr^2 |
Circumference of a circle | pixd or 2xpixr |
Perimeter of a rectangle | 2L+2W |
Primeter of a triangle | s1+s2+s3 |
Perimiter of any shape | add all sides |
Constamt of proportionality | y=kx and k=y/x |
Percent proportion | is/of=%/100 |
Percent of change proportion | change/original=%/100 |
Tax, Tip, Markup, Commission | is/of=%/100, then add |
Sales, discount, markdown | is/of=%/100 then subtract |
% of error | =EV-AV/AAx100 |
Simple Interest | I=prt |