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7 math formulas STC
Term | Definition |
---|---|
Area of a square | A=s^2 |
area of a rectangle | A=b.h |
area of a triangle | A=b.h/2 |
area of a circle | A=3.14 r^2 |
circumference of a circle | C=3.14 d or C=2 3.14 r |
perimeter of a rectangle | P=2L+2W |
perimeter of a triangle | P=s1+s2+s3 |
perimeter of any shape | P=sum of all sides |
Constant 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 - |
% of error | =ev-av/av times 100% |
simple interest | I=PxRxT |