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GeoGebra

Circle Equation Anatomy and Exploration

Author:Tim Brzezinski

Interact with this app for a minute or two. Be sure to move any LARGE POINT(S) you see around! Then answer the questions that follow.

What do you notice about the equation of a circle (in the upper left corner)? Does it look like any other equation we've seen in the past? If so, describe!

What would the equation of circle with center (0,0) and radius = 9 be?

Select all that apply
  • A
  • B
Check my answer (3)

If a circle graph has equation , what would its radius be?

Select all that apply
  • A
  • B
Check my answer (3)

Interact with this app for a minute or two. Be sure to move any LARGE POINT(S) you see around! Then answer the questions that follow.

Suppose a circle has center and has a radius of . What would its equation be?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

Suppose a circle has center and has a radius of . What would its equation be?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

Suppose a circle has center and has a radius of . What would its equation be?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

Suppose a circle has center and has a radius of . What would its equation be?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

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