Question

1-3. Find the center point, the radius and the diameter for the following equation: x² + y2 = 16

Answer 1

Center: (0, 0)

Radius: 4

Explanation:

Circle Standard Equation: (x - h)² + (y - k)² = r²

(h, k) is center

r is radius

We see that our h and our k are both 0.

∴ Our center is (0, 0), origin.

We see that our r² = 16

√r² = √16

∴ Our radius is equal to 4