«Ma-POW!«

(Math - Problem of the Week)

 


  Total
Sweet 3
Roberts 1
Tarplee 2
Pomeroy 1
Kefover 1
   
   
   
   
   
   

 


 

Ma-POW #1 - Solutions

Over the break, I started making a headboard for a bed which has an arched board at the top.  In order to mark off the cut, I laid the board on the ground, staked one end of a cord to the ground, and swung the other end of the cord through a circular arc, holding a pencil at the appropriate distance.  If the board was 76” long and the circular arc comes down 3” from the top on each side as shown, what length rope did I use to mark off the cut (or, what is the radius of the circular arc)?