Comment on The SAT Question Everyone Got Wrong

• protist@mander.xyz ⁨1⁩ ⁨year⁩ ago

  Does not compute

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  • schmidtster@lemmy.world ⁨1⁩ ⁨year⁩ ago

    It’s in the video.

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    • protist@mander.xyz ⁨1⁩ ⁨year⁩ ago

      First you said add the radii together, then you gave an example subtracting them, but either way this is incorrect. You divide the larger radius by the smaller radius and add 1

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    • uphillbothways@kbin.social ⁨1⁩ ⁨year⁩ ago

      Not quite. With radius 2 and 3 circles, the outer circle would take 2.5 rotations to complete the revolution. You have to set the first circle radius to 1 and then add the radii to calculate the relative circumference of the circle drawn by the motion of the center of the outer circle, so the answer would be calculated like:

      2/2 + 3/2 = 5/2 = 2.5

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• SpaceNoodle@lemmy.world ⁨1⁩ ⁨year⁩ ago

  [deleted]

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  • schmidtster@lemmy.world ⁨1⁩ ⁨year⁩ ago

    …?

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    • bisby@lemmy.world ⁨1⁩ ⁨year⁩ ago

      Its not even remotely what you said. Its A/B+1 or A/B-1 for an interior loop.

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      • schmidtster@lemmy.world ⁨1⁩ ⁨year⁩ ago

        They explain multiple ways to do it in the video. A circle with a radius of 2 and a circle with a radius of 3 would be 5.

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