Home > INT2 > Chapter 10 > Lesson 10.1.1 > Problem 10-7
10-7.
What is the equation of the circle?
Sketch a right triangle from the origin as in
and label the hypotenuse with the value for the radius. The equation of a circle is directly derived from the Pythagorean Theorem.
On graph paper, sketch the graph of
. What is the radius? The circle with equation
has a radius of .