Formulas for Area of a Polygon

• Triangle 


  A= 1/2 bh
• Equilateral Triangle


  A= (/3)/4 b^2
• Square


  A= s^2
• Rectangle


  A= LW
• Parallelogram 


  A= 1/2 (b1 + b2)h
• Trapezoid


  A= bh
• Rhombus/Kite


  A= 1/2d1d2
• Circle


  A= (pi)r^2
• Sector


  P= 2r + (arc/360)c
• Sector 


  A= (arc/360)(pi)r^2