



 
Hi Bob, In the diagram below h is the height of the arc at the centre point of the cord in inches and C is the centre of the circle. Since triangle ABC is a right triangle you can use Pythagoras' Theorem to obtain
Expanding yields
Solving using the general quadratic yields h = 2 inches or h = 50 inches.(50 inches is the distance from B to the opposite side of the circle.) Penny  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 