l An annulus has large radius 12 and small radius 5

Enter Large Radius

Enter small radius

Answer
25 ≤ x2 + y2 ≤ 144

↓Steps Explained:↓



An annulus has a large radius (R) of 12

It has a small radius (r) of 5

Calculate the Area and equation

Annulus Area Formula:

A = π(R2 - r2)

Plug in A = 12 and r = 5

A = π(122 - 52)

A = π(144 - 25)

A = 119π ~ 373.8495

Annulus Equation

Assume a radius of (0,0)

r2 ≤ x2 + y2 ≤ R2

Final Answer

25 ≤ x2 + y2 ≤ 144

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