Question: If the coordinates of the center of a circle are (3, 4) and the radius is 5, what is the equation of the circle?

Options:

1. (x-3)² + (y-4)² = 25
2. (x+3)² + (y+4)² = 25
3. (x-3)² + (y-4)² = 5
4. (x-3)² + (y-4)² = 20

Correct Answer: (x-3)² + (y-4)² = 25

Solution:

The standard form of the equation of a circle is (x-h)² + (y-k)² = r², where (h, k) is the center and r is the radius.