What is the radius of a circle with the equation (x - 3)² + (y + 2)² = 25?

Practice Questions

Q1
What is the radius of a circle with the equation (x - 3)² + (y + 2)² = 25?
  1. 5
  2. 10
  3. 15
  4. 20

Questions & Step-by-Step Solutions

What is the radius of a circle with the equation (x - 3)² + (y + 2)² = 25?
  • Step 1: Identify the equation of the circle, which is (x - 3)² + (y + 2)² = 25.
  • Step 2: Recognize that the standard form of a circle is (x - h)² + (y - k)² = r², where (h, k) is the center and r is the radius.
  • Step 3: In the given equation, the right side is 25, which represents r².
  • Step 4: To find the radius (r), take the square root of r². So, r = √25.
  • Step 5: Calculate √25, which equals 5.
  • Step 6: Therefore, the radius of the circle is 5.
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