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2023 AMC 10B Problem 20

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2023 AMC 10B Problem 20AMC 10 Step by Step
Name:                             Date: September 13, 2026
Solid Geometry · difficulty 4 of 5 · about 6 min · position P16-20

Four congruent semicircles are drawn on the surface of a sphere with radius 22 , as shown, creating a close curve that divides the surface into two congruent regions. The length of the curve is πn\pi\sqrt{n} . What is nn ?

figure

  1. A)

    3232

  2. B)

    1212

  3. C)

    4848

  4. D)

    3636

  5. E)

    2727

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