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Surface area

Postby LEXYGIRL1129 » Mon May 27, 2013 9:29 am

I need to figure out how to determine the surface area of different shapes (ie: heart, star, fish, and lime slice) that are not "normal" geometrical shapes. I know the length, width, and height of the objects but can't figure out the surface area.

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Re: Surface area

Postby raytrent » Mon May 27, 2013 10:04 pm

The volume is easy, just displace water with the object.

I don't know any simple way to determine the surface area of non-geometric objects in general, other than to 3d scan the object into a CAD program and have it calculate it for you.

You could estimate by drawing triangles on the object and calculating the area of the triangles.

What project is this for?

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Re: Surface area

Postby hhemken » Thu May 30, 2013 12:14 pm

I agree with ray. An easy way is if you can draw it accurately on paper and subdivide it into simple shapes like right triangles, rectangles, or circle sections and add up the sub-areas.
Heinz Hemken
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Re: Surface area

Postby arunmathew98 » Mon Jul 27, 2015 10:02 pm

Here's what I would Do.. Similar to Ray, I would Break it up to ,not just Triangles, but other figures too. say a Star, you could break it up into 5 (im guessin :P) triangular prisms and the remaining part would become a pentagon(again, Im guessing :P).. in the end add them up...

or just as Ray said Use CAD. or ask someone who knows how to.

hope it helps :)

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