Circles with center at origin
Desmos File: Graphing r = a

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Desmos File: Graphing r = a

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Circles with center on x axis
Desmos File: Graphing r = 2a cos(θ)

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Desmos File: Graphing r=2acos (θ)

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Desmos File: Graphing r = 2a cos(θ)

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Desmos File: Graphing r = 2acos (θ)

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Circles with center on y axis
Desmos File: Graphing r = 2a sin(θ)

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Desmos File: Graphing r=2asin (θ)

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Desmos File: Graphing r = 2a sin(θ)

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Desmos File: Graphing r=2asin (θ)

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