Suppose that AB is the diameter of a circle with çenter O and that C is a point on one of the two arcs joining A and B. Show that CÁ and CB are orthogonal without using coordinates. A В

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A: Geometry Question

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Q: Theorem 78 states that if the radius of a circle is r, its area is πr2. true or false

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Q: What is the degree of rotation that takes quadrilateral FGHI to F'G'H'I? H F' G

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Q: Let ä = (4, 3) and b = (- 3, k). Find k so that ä and & will be orthogonal (form a 90 degree angle).

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Q: If AB is the diameter of the circle with A = (-2,6) and B = (5,4), then the %3D center of the circle…

A: The diameter of the circle is:  AB where coordinates of A is  (-2, 6) and  B is  (5, 4).