# Communications A radio antenna tower is kept perpendicular to the groundby three wires

**Chapter 11, Problem 9**

(choose chapter or problem)

Communications A radio antenna tower is kept perpendicular to the groundby three wires of equal length. The wires touch the ground at three points ona circle whose center is at the base of the tower. The wires touch the ground atA (2, 6) , B (-2, -2) , and C (-5, 7) . a. What are the coordinates of the base of the tower? b. Each unit of the coordinate plane represents 1 ft. What is the diameter ofthe circle?

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