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Mathematics 7 Online
OpenStudy (anonymous):

The two solids are similar and the ratio between the lengths of their edges is 2:9. What is the ratio of their surface areas?

OpenStudy (anonymous):

OpenStudy (anonymous):

@agent0smith

OpenStudy (mertsj):

The ratio of the perimeters is the same as the ratio of their edges. The ratio of the areas is the square of the ratio of their edges The ratio of the volumes is the cube of the ratio of their edges.

OpenStudy (anonymous):

So it would be C?

OpenStudy (mertsj):

yes

OpenStudy (anonymous):

ok thank you can you help me with this one too please

OpenStudy (mertsj):

How is this different from the last one?

OpenStudy (anonymous):

This one would be B right?

OpenStudy (mertsj):

What is the ratio of the edges?

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