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Math Help - Equation for an arc

  1. #1
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    Equation for an arc

    I need some help with the equation of an arc. I want it to be part of a perfect circular arc (not oval, etc) in the +/+ quadrant. It should start at 0, 10 and go down to 10, 0. Can someone help me out with the equation for that? Should look like the top right quarter of a circle centered around 0, 0 point. I'm a bit stuck. Really I want to put this into an Excel graph but figure I'll just use the equation to create 10 points and graph it based on that.

    Thanks!
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  2. #2
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    Hello, mateoc15!

    You have a circle, centered at (0,0) with radius 10.

    Its equation is: . x^2 + y^2 \:=\:10^2

    For the quarter-circle in Quadrant 1: .  y \:=\:\sqrt{100-x^2}\;\text{ for }\, 0 \leq x \leq 10

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  3. #3
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    Perfect! Thanks!
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