Remembering Similar Polygons
  Similar polygons have all the Angles 
   congruent and the Sides have the same 
   ratios. (like these three houses)
    Remember this Theorem 
  If two polygons are similar (equal angles and 
   corresponding sides in ratios), then the 
   perimeters ratio is the same as the scale 
   factor.
  Perimeters are 24:16 
  same ratio as 3:2 for the sides 
                    Theorem 
    If two polygons are similar (equal angles and 
      corresponding sides in ratios), then the 
      Area ratio is the same as the scale factor 
      squared. (in the regular hexagons)
           6
                                 Perimeter Ratio
                        2        6:2 3:1
                                 Area Ratio
                                  2  2
                                 3 :1  9:1
     Find the Area and Perimeter
   The given figures are similar
   Perimeter 32
   Area 60              Perimeter
                        Area
  8               5
               How would you find the area?
     Find the Area and Perimeter
   The given figures are similar
   Perimeter 32
   Area 60              Perimeter
                        Area
  8                    Perimeter Ratio
                  5
                       8:532:?
                       Area Ratio
                       82 :52  64:2560:?