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Papessa [141]
3 years ago
11

What is the standard equation for the circle passing through (0,9) centered at the origin

Mathematics
1 answer:
Yanka [14]3 years ago
4 0
Start with x^2 + y^2 = r^2, where r signifies radius.  Subst. 0 for x and 9 for y:

0^2 + 9^2 = r^2.  Therefore, r = 9.

The std eqn is x^2 + y^2 = 9^2.  this is a special case of 

(x-h)^2 + (y-k)^2 = r^2 and is appropriate because the origin is at (0,0).

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