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Comment on The SAT Question Everyone Got Wrong
schmidtster@lemmy.world 11 months agoAdd the radius together. If the circle is inside. A-B 3-1 = 2.
SpaceNoodle@lemmy.world 11 months ago
schmidtster@lemmy.world 11 months ago
…?
bisby@lemmy.world 11 months ago
Its not even remotely what you said. Its A/B+1 or A/B-1 for an interior loop.
schmidtster@lemmy.world 11 months 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.
protist@mander.xyz 11 months ago
Does not compute
schmidtster@lemmy.world 11 months ago
It’s in the video.
protist@mander.xyz 11 months 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
uphillbothways@kbin.social 11 months 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