find the center of the circle that circumscribes triangle ABC.
1. A (0,0),B (6,4),C (6,0)
2. A (-3,11),B (9,11),C (-3,21)
just set up and solve the three simultaneous equations.
you know that the equation of a circle is: where is the center.
take to be and respectively, you get:
.................................(1)
.................................(2)
.................................(3)
now solve this system for and only
the second problem is done similarly