SOLUTION: HOW TO DO SURFACE AREA ON A RECTANGULAR PRISM WHEN OVERLAPPED ? our teacher doesnt explain the formula of the rectangular prism... and doesnt know how to explain ANYTHING! i have a

Algebra ->  Surface-area -> SOLUTION: HOW TO DO SURFACE AREA ON A RECTANGULAR PRISM WHEN OVERLAPPED ? our teacher doesnt explain the formula of the rectangular prism... and doesnt know how to explain ANYTHING! i have a      Log On


   

Question 266482: HOW TO DO SURFACE AREA ON A RECTANGULAR PRISM WHEN OVERLAPPED ? our teacher doesnt explain the formula of the rectangular prism... and doesnt know how to explain ANYTHING! i have a UNIT TEST on TUESDAY.. and i seem to understand absoloute nothing. I would prefer to ask my teacher for help... but he never demonstrates or teachees anything right.. I REALLY WANT A TUTOUR OF MY OWN OR ELSE I WILL FAIL GRADE 9 MATH.. WHEN IM A STRAIGHT A STUDENT..
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
To find the surfice area of a rectangle prism you need to just find the area of the 6 sides and add them together.
Find the area of two sides (Length*Height)*2 sides = 2(LH)
Find the area of adjacent sides (Width*Height)*2 sides = 2(WH)
Find the area of ends (Length*Width)*2 ends = 2(LW)
Add the three areas together to find the surface area (S)
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Example: The surface area of a rectangular prism 5 cm long, 3 cm. wide and 2 cm. high.
so 2%28LH%29%2B2%28WH%29%2B2%28LW%29=S
2%285%2A2%29%2B2%283%2A2%29%2B2%285%2A3%29=S
20%2B12%2B30=S
62cm%5E2=S
as far as over lapping id need to know where they are overlapped at and ofcourse the dimensions of both prisms.
but i hope this helped a little bit