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(1) The radius of the circle with equation x^2 + y^2 = 36 is 6. The point (2,3) lies inside this circle. (2) For the circle with diameter from (1,0) to (4,4), the center is (2.5, 2), radius is 5/2, and equation is (x - 2.5)^2 + (y - 2)^2 = 25/4. (3) The equation of the tangent to the circle x^2 + y^2 = 25 at point (3,4) is 3x + 4y - 25 = 0. The equation of the other tangent parallel to this is

Author

Graham Moore

Language

EN