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Mathematics 21 Online
OpenStudy (anonymous):

Which 2-dimensional shape can be rotated about the y-axis to create a sphere?

OpenStudy (anonymous):

|dw:1407976299060:dw|

OpenStudy (anonymous):

circle?

OpenStudy (anonymous):

If a semi-circle was rotated quickly about the y-axis, the resulting would be a sphere.

OpenStudy (anonymous):

A diagonal cross section of a sphere produces which 2-dimensional shape? so this question would be a sphere or a circle to?

OpenStudy (anonymous):

A vertical semicircle

OpenStudy (anonymous):

a circle only. Imagine that you cut a water melon which shape is a sphere into 2 pieces. what can you see on top? |dw:1407976889687:dw|

OpenStudy (anonymous):

half of a sphere

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