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4-64.

CECIL’S LATEST TRICK

To amaze the audience, Cecil set up four tightropes in a rectangle, each connected at a pole as shown in the diagram at right. A ladder down from the ropes is located at point .

  1. If Cecil starts at point and must travel completely around the rectangle, how far must Cecil travel?

    The distance Cecil must travel is the perimeter of the rectangle made by the four tightropes.

    feet

  2. How can Cecil’s distance be represented by an expression?

    Perimeter can be written as . Use this expression, substituting the appropriate values for ''width'' and ''length.''

vertexA

left edge

 rectangle interior
 

 rectangle interior
 

 rectangle interior
 

 rectangle interior
 

 rectangle interior
 

 rectangle interior
 

bottom edge