Best Answer

Related Post

Spread the word

Digg this post

Bookmark to delicious

Stumble the post

Add to your technorati favourite

Subscribes to this post

3 Comments Already

mygif
como Said,
February 2nd, 2011 @7:14 am  

x ² + y ² = 2 ²
x ² + y ² = 4
(the equation of a circle centre O , radius 2)

mygif
Puzzling Said,
February 2nd, 2011 @7:27 am  

Remember the distance formula, based on the pythagorean theorem?

If you have a horizontal distance x and a vertical distance y, then the hypotenuse will be x² + y²

So your formula is x² + y² = 2²
or
x² + y² = 4

Or solving in terms of y:

y² = 4 – x²
y = sqrt(4 – x²)

mygif
Tippy T Said,
February 2nd, 2011 @8:05 am  

pythagoras’ theorem
c^2 = a^2 + b^2

4 = x^2 + y^2

x^2 + y^2 – 4 = 0

y^2 = 4 – x^2

y = sqrt(4 – x^2)

Leave Your Comments Below

Please Note: All comments will be hand modified by our authors so any unsuitable comments will be removed and you comments will be appreared after approved