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# Darian, Thavychith

### Formula for 7th grade math

TermDefinition
Area of a Spuare A=S^2
Area of a Rectangle A=bh
Area of a Triangle A=bh/2
Area of a Circle A=Pii*r^2
Circomference of a cirecle Pii*d Or C=2*pii*r
Perimeter of a rectangle P=2(L)+2(w)
perimeter of a Triangle P=SL+S2+S3
perimeter of ant shape P=sum of all sides
Constant of Proportionality Y=Kx And K=y/x
percent proportion is/of=%/100
Percent of change proprtion Change/original =%/100
Tax,Tip,Markup,commission Is/of=%/100,then(+)
Sales,Discount,Markdown Is/of=%/100,then(-)
Created by: 18thavyd.