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circle Problems

Rakdos
in Mathematics

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In this circle my.php?image=circle1ik.png

how do you find x

 

[math]9^2+(x-3)^2=(x-3)^2[/math] right??

You can form a pair of simultaneous equations:

 

[math]x^2 + 9^2 = r^2[/math] where r is the radius of the circle, and:

[math]x = r-3[/math]

 

Substitute the second into the first and you're done.

  • Author

thanks dave it was a bonus question on a test today and i wanted to know if my anwser was right, it wasn't

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