Published byVance Goodier Modified over 8 years ago
Circle – Formulas Radius of the circle is generally denoted by letter R. Diameter of the circle D = 2 × R Circumference of the circle C = 2 × × R ( = 22/7) Area of the circle A = × R2
Quadrilaterals – Formulas
Rhombus Square Rectangle Area = lb Perimeter = 2(l+b) l = length b = breadth Area = (d1d2)/2 Perimeter = 4s s = side d1,d2 = diagonals Area = s2 Perimeter = 4s (s = side) Kite Trapezium Parallelogram Area = ba Perimeter = 2(l + b) (b = base/breadth a = altitude l = length) d1, d2 = diagonals
Triangles – Formulas Area of a triangle = ½ × base × height
Perimeter of an equilateral triangle = 3s (s = side) Area of an equilateral triangle
Solids – Formulas
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