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Math Help - equation of a circle given the tangents

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    equation of a circle given the tangents

    Can someone please explain the steps to solve this problem? I'm taking the ACT on Thursday and am trying to teach myself Trig.

    A circle in the std. (x,y) coordinate plane is tangent to the x-axis at 5 and tangent to the y-axis at 5. What is the equation of the circle?
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    Quote Originally Posted by ninobrn99 View Post
    Can someone please explain the steps to solve this problem? I'm taking the ACT on Thursday and am trying to teach myself Trig.

    A circle in the std. (x,y) coordinate plane is tangent to the x-axis at 5 and tangent to the y-axis at 5. What is the equation of the circle?
    standard equation for a circle ...

    (x - h)^2 + (y - k)^2 = r^2

    center is at coordinates (h,k) and has radius r


    for your circle ...

    center is at the point (5,5) , with radius 5

    (x-5)^2 + (y-5)^2 = 5^2
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