Admin  Date: Sunday, 02/Apr/2017, 08:23  Message # 1 
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 LEARN FORMULAS FOR DIFFERENT POLYGONS: PART 1
RECTANGLE
Area = Length x Width (A = LW) Perimeter = (Length + Width) x 2 Width = Area ÷ Length Length = Area ÷ Width Width = P/2  Length Length = P/2 – Width SQUARE
Area by using its side = side x side Area by using its diagonal = ½ x d2 Perimeter = side x 4 Side = Perimeter ÷ 4 Side = Square root of the area Width = P/2  Length Length = P/2 – Width TRIANGLE
Area = 1/2bh Perimeter = sum of all sides surrounding the triangle Height = (Area x 2) ÷ base Base = (Area x 2) ÷ Height Pythagoras theorem: a2 + b2 = c2 (a = height, b=base and c=hypotenuse) PARALLELOGRAM
Area = Base x height Base = Area ÷ Height Height = Area ÷ Base RHOMBUS
Area = ½ x d1 x d2 (d1 and d2 are diagonals of rhombus) TRAPEZIUM (TRAPEZOID)
Area = 1/2h(a+b) or (a+b) ÷2 x h Length a = [(area x 2) ÷ h] – b Length b = [(area x 2) ÷ h] – a Height = (area x 2) ÷ (a+b) KITE
Area = ½ x d1 x d2 (d1 and d2 are diagonals of a Kite) ********* END OF PART ONE **********


 
don  Date: Monday, 03/Apr/2017, 16:22  Message # 2 
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 Thank you for the formulaes


 
mam  Date: Thursday, 15/Jun/2017, 16:12  Message # 3 
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 Me too


 