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OpenStudy (anonymous):
What shape could be rotated about the y-axis as shown below to form a square pyramid? a. Sphere b. Cone c. Cylinder d. None of the above
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OpenStudy (anonymous):
Directrix (directrix):
The square pyramid looks like this.
OpenStudy (anonymous):
so d?
Directrix (directrix):
So, the answer will have to be a cross section of it.
Directrix (directrix):
That's what I think, D. I don't see that it is possible to spin any of the solids A, B, or C to get that pyramid.
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