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Rouault
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Find the distance of the two points on the rectangle that are furthest apart. Use a^2+b^2=c^2, c is the hypotenuse, a and b are the two sides

Nancy_Lam
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a and b for wide and long?

3lroy
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so what is the question so i can solve

Nancy_Lam
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yes. can you look on the link

Nancy_Lam
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how I can find the radius of sphere?

3lroy
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but the area of a sphere is 3/4 PI r²h rite???

Nancy_Lam
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let me look

Nancy_Lam
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A=4pir^2

3lroy
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ok

Nancy_Lam
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how i can find the radius of sphere , given rectangular dimention

3lroy
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thats what im thinking rite now

dhatraditya
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its A.

Nancy_Lam
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can you tell me how to get that answer?

3lroy
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so what is the base of the sphere

dhatraditya
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it is from the center of the rectangular cube to one of its extremes.

3lroy
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ok continue

dhatraditya
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that is , sqrt [(4/2)^2+(5/2)^2+(7/2)^2]

dhatraditya
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just visualize the rectangular solid, you will see immediately that that is the case.

3lroy
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ok good job


Nancy_Lam
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Im there now

Nancy_Lam
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I dn't know how start

3lroy
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im there now