Use only double integrals to find the volume of a solid tetrahedron
Use only double integrals to find the volume of the solid tetrahedron with vertices $(0,0,0)$, $(0,0,1)$, $(0,2,0)$ and $(2,2,0)$.
I know you plot the points on $xyz$-plane, but how do you get the equation of the plane that goes in the equation by the four vertices?
multivariable-calculus
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Use only double integrals to find the volume of the solid tetrahedron with vertices $(0,0,0)$, $(0,0,1)$, $(0,2,0)$ and $(2,2,0)$.
I know you plot the points on $xyz$-plane, but how do you get the equation of the plane that goes in the equation by the four vertices?
multivariable-calculus
1
This doesn't really require calculus. The volume of the tetrahedron can be found by evaluating a determinant.
– Alan
Oct 4 '14 at 0:55
I don't understand your final sentence. Could you revise it? (Grammatically speaking, it's not coherent.) Also, there's no such thing as an "$xyz$-plane"; a plane is two-dimensional, but $x$, $y$ and $z$ are three dimensions.
– Chase Ryan Taylor
Aug 28 '17 at 0:55
add a comment |
Use only double integrals to find the volume of the solid tetrahedron with vertices $(0,0,0)$, $(0,0,1)$, $(0,2,0)$ and $(2,2,0)$.
I know you plot the points on $xyz$-plane, but how do you get the equation of the plane that goes in the equation by the four vertices?
multivariable-calculus
Use only double integrals to find the volume of the solid tetrahedron with vertices $(0,0,0)$, $(0,0,1)$, $(0,2,0)$ and $(2,2,0)$.
I know you plot the points on $xyz$-plane, but how do you get the equation of the plane that goes in the equation by the four vertices?
multivariable-calculus
multivariable-calculus
edited Aug 28 '17 at 1:01
Chase Ryan Taylor
4,38021530
4,38021530
asked Oct 3 '14 at 21:27
user177780
162
162
1
This doesn't really require calculus. The volume of the tetrahedron can be found by evaluating a determinant.
– Alan
Oct 4 '14 at 0:55
I don't understand your final sentence. Could you revise it? (Grammatically speaking, it's not coherent.) Also, there's no such thing as an "$xyz$-plane"; a plane is two-dimensional, but $x$, $y$ and $z$ are three dimensions.
– Chase Ryan Taylor
Aug 28 '17 at 0:55
add a comment |
1
This doesn't really require calculus. The volume of the tetrahedron can be found by evaluating a determinant.
– Alan
Oct 4 '14 at 0:55
I don't understand your final sentence. Could you revise it? (Grammatically speaking, it's not coherent.) Also, there's no such thing as an "$xyz$-plane"; a plane is two-dimensional, but $x$, $y$ and $z$ are three dimensions.
– Chase Ryan Taylor
Aug 28 '17 at 0:55
1
1
This doesn't really require calculus. The volume of the tetrahedron can be found by evaluating a determinant.
– Alan
Oct 4 '14 at 0:55
This doesn't really require calculus. The volume of the tetrahedron can be found by evaluating a determinant.
– Alan
Oct 4 '14 at 0:55
I don't understand your final sentence. Could you revise it? (Grammatically speaking, it's not coherent.) Also, there's no such thing as an "$xyz$-plane"; a plane is two-dimensional, but $x$, $y$ and $z$ are three dimensions.
– Chase Ryan Taylor
Aug 28 '17 at 0:55
I don't understand your final sentence. Could you revise it? (Grammatically speaking, it's not coherent.) Also, there's no such thing as an "$xyz$-plane"; a plane is two-dimensional, but $x$, $y$ and $z$ are three dimensions.
– Chase Ryan Taylor
Aug 28 '17 at 0:55
add a comment |
2 Answers
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HINT: If you are going to integrate with respect to $x$ and $y$, then the vectors $(0,2,0)-(0,0,1)=(0,2,-1)$ and $(2,2,0)-(0,0,1)=(2,2,-1)$ are in the plane you want. So $(0,2,-1)times (2,2,-1)$ is a normal vector for the plane you want.
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Integrating with respect to $x$ and $y$, then
- the "base" triangle in that plane is given by $(0,0,0)$,$(0,2,0)$,$(2,2,0)$, and $(x,y)$ shall vary in that triangle;
- the "roof" plane, that is the plane that bounds the $z$ height, will be the plane passing through $(0,0,1)$,$(0,2,0)$,$(2,2,0)$.
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
HINT: If you are going to integrate with respect to $x$ and $y$, then the vectors $(0,2,0)-(0,0,1)=(0,2,-1)$ and $(2,2,0)-(0,0,1)=(2,2,-1)$ are in the plane you want. So $(0,2,-1)times (2,2,-1)$ is a normal vector for the plane you want.
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HINT: If you are going to integrate with respect to $x$ and $y$, then the vectors $(0,2,0)-(0,0,1)=(0,2,-1)$ and $(2,2,0)-(0,0,1)=(2,2,-1)$ are in the plane you want. So $(0,2,-1)times (2,2,-1)$ is a normal vector for the plane you want.
add a comment |
HINT: If you are going to integrate with respect to $x$ and $y$, then the vectors $(0,2,0)-(0,0,1)=(0,2,-1)$ and $(2,2,0)-(0,0,1)=(2,2,-1)$ are in the plane you want. So $(0,2,-1)times (2,2,-1)$ is a normal vector for the plane you want.
HINT: If you are going to integrate with respect to $x$ and $y$, then the vectors $(0,2,0)-(0,0,1)=(0,2,-1)$ and $(2,2,0)-(0,0,1)=(2,2,-1)$ are in the plane you want. So $(0,2,-1)times (2,2,-1)$ is a normal vector for the plane you want.
answered Oct 4 '14 at 1:24
Laars Helenius
6,2611323
6,2611323
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Integrating with respect to $x$ and $y$, then
- the "base" triangle in that plane is given by $(0,0,0)$,$(0,2,0)$,$(2,2,0)$, and $(x,y)$ shall vary in that triangle;
- the "roof" plane, that is the plane that bounds the $z$ height, will be the plane passing through $(0,0,1)$,$(0,2,0)$,$(2,2,0)$.
add a comment |
Integrating with respect to $x$ and $y$, then
- the "base" triangle in that plane is given by $(0,0,0)$,$(0,2,0)$,$(2,2,0)$, and $(x,y)$ shall vary in that triangle;
- the "roof" plane, that is the plane that bounds the $z$ height, will be the plane passing through $(0,0,1)$,$(0,2,0)$,$(2,2,0)$.
add a comment |
Integrating with respect to $x$ and $y$, then
- the "base" triangle in that plane is given by $(0,0,0)$,$(0,2,0)$,$(2,2,0)$, and $(x,y)$ shall vary in that triangle;
- the "roof" plane, that is the plane that bounds the $z$ height, will be the plane passing through $(0,0,1)$,$(0,2,0)$,$(2,2,0)$.
Integrating with respect to $x$ and $y$, then
- the "base" triangle in that plane is given by $(0,0,0)$,$(0,2,0)$,$(2,2,0)$, and $(x,y)$ shall vary in that triangle;
- the "roof" plane, that is the plane that bounds the $z$ height, will be the plane passing through $(0,0,1)$,$(0,2,0)$,$(2,2,0)$.
answered Jan 23 '18 at 18:52
G Cab
18k31237
18k31237
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This doesn't really require calculus. The volume of the tetrahedron can be found by evaluating a determinant.
– Alan
Oct 4 '14 at 0:55
I don't understand your final sentence. Could you revise it? (Grammatically speaking, it's not coherent.) Also, there's no such thing as an "$xyz$-plane"; a plane is two-dimensional, but $x$, $y$ and $z$ are three dimensions.
– Chase Ryan Taylor
Aug 28 '17 at 0:55