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Mathematics 9 Online
OpenStudy (anonymous):

URGENT HELP ME DRAW A NET FOR GEOMETRY

jimthompson5910 (jim_thompson5910):

A net for which 3D object?

OpenStudy (anonymous):

yes a net for 3D object it says: Draw a net for a cylinder with a height of 4 units and a radius of 3 units. Thank you

jimthompson5910 (jim_thompson5910):

Here is a 3D cylinder |dw:1360546977531:dw|

OpenStudy (anonymous):

yes, can you draw out the cylinder as if you cut it open, that is the definition of a net

jimthompson5910 (jim_thompson5910):

now imagine that cylinder had paper covering the entire surface area if you somehow managed to cut the paper covering loose without tearing the paper too much and without losing any shreds of paper, you would get this for the lateral side |dw:1360547056361:dw| and two circles for the top and bottom |dw:1360547104773:dw|

jimthompson5910 (jim_thompson5910):

so connect the two to make a complete net |dw:1360547125739:dw|

jimthompson5910 (jim_thompson5910):

this is the completely flattened 2D version of this |dw:1360547181441:dw|

jimthompson5910 (jim_thompson5910):

the best way to see this is if you printed this net out cut the net out then folded and taped up the net to get the 3D figure

jimthompson5910 (jim_thompson5910):

so to sum things up |dw:1360547230982:dw| unfolds to this |dw:1360547271036:dw|

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