Maths

• Area of triangle

  A= 1/2 bh
• volume of cylinder


  V=πr²h
• Volume of a sphere


  V=4/3πr³
• Volume of a semi sphere


  V=2/3πr³
• Surface area of a sphere


  SA=4πr²
• surface area of cylinder


  2πrh+2πr²
• Surface Area of a Semi Sphere


  SA=3πr²
• Volume of a triangular prism


  V=(1/2bh)h
• Area of parallelogram


  base x height
• Volume of pyramid


  1/3 x area of base x height
• Volume of a cone


  V=1/3πr²h
• Surface area of cone


  SA=πrl+πr²
• Volume of frustum 


  Volume of original-volume of removed