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The Witch's Magic
Sequencing
High 9
Math
circle equation (6th)
Hyesung Kang
18
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# 1

Multiple Choice

What is the standard equation of a circle centered at the origin?

  • x² + y² = r²
  • (x - h)² + (y - k)² = r²
  • x² + y² = h² + k²
  • (x + h)² + (y + k)² = r²

# 2

Multiple Choice

If a circle has a center at (3, 4) and radius 5, what is its equation?

  • x² + y² = 25
  • (x + 3)² + (y + 4)² = 25
  • (x - 3)² + (y - 4)² = 5
  • (x - 3)² + (y - 4)² = 25

# 3

Multiple Choice

Which of the following points lies on the circle with the equation x² + y² = 16?

  • (4, 0)
  • (0, 4)
  • (3, 2)
  • (2, 3)

# 4

Multiple Choice

What is the radius of a circle with the equation (x - 1)² + (y + 2)² = 9?

  • 1
  • 2
  • 3
  • 9
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