Thursday, March 13, 2014

Area and Perimeter of Common Shapes

Triangles:
Area given all sides (SSS) - Heron's Formula

Heron of Alexandria:

Rectangles and Squares:
  
Parallelograms:
 
 Trapezoids:
 
Circles:
Polygons
Convex Regular Polygons (n-gons)
  • Pentagon – n = 5 sides
  • Hexagon – n = 6 sides
  • Heptagon – n = 7 sides
  • Octagon – n = 8 sides
  • Nonagon – n = 9 sides
  • Decagon – n = 10 sides

Perimeter and Area
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