[i] Let ABCD be a parallelogram where A is (2,−1,−3), B is (1,0,−2) and C is (2,3,1). (a) Find the coordinates of D. Hint:- Draw a parallelogram ABCD. Let D be (x,y,z). Notice that the parallelogram must have this property, AB=DC and BC=AD. Use it to find D. (b) Once you have found D, find the area of this parallelogram.

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter10: Analytic Geometry
Section10.CT: Test
Problem 3CT
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[i] Let ABCD be a parallelogram where A is (2,−1,−3), B is (1,0,−2) and C is (2,3,1).

(a) Find the coordinates of D.

Hint:- Draw a parallelogram ABCD. Let D be (x,y,z). Notice that the parallelogram must have this property, AB=DC and BC=AD. Use it to find D.

(b) Once you have found D, find the area of this parallelogram.

[ii] Let ABCD be a tetrahedron with A(−4,1,2), B(0,2,−2), C(1,−1,2) and D(1,0,2). Find

(c) The surface area of the side ABC.

(d) The volume of the tetrahedron.

Written solution with steps please, thank you!

[i] Let ABCD be a parallelogram where A is (2, -1, -3), B is (1,0, -2) and C' is
(2, 3, 1).
(a) Find the coordinates of D.
Hint:- Draw a parallelogram ABCD. Let D be (x, y, z). Notice that the parallelogram must
have this property, AB = DC and BC = AD. Use it to find D.
(b) Once you have found D, find the area of this parallelogram.
[ii] Let ABCD be a tetrahedron with A(-4, 1, 2), B(0, 2, -2), C(1,-1, 2) and D(1,0,2).
Find
(c) The surface area of the side ABC.
(d) The volume of the tetrahedron.
Transcribed Image Text:[i] Let ABCD be a parallelogram where A is (2, -1, -3), B is (1,0, -2) and C' is (2, 3, 1). (a) Find the coordinates of D. Hint:- Draw a parallelogram ABCD. Let D be (x, y, z). Notice that the parallelogram must have this property, AB = DC and BC = AD. Use it to find D. (b) Once you have found D, find the area of this parallelogram. [ii] Let ABCD be a tetrahedron with A(-4, 1, 2), B(0, 2, -2), C(1,-1, 2) and D(1,0,2). Find (c) The surface area of the side ABC. (d) The volume of the tetrahedron.
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Solution to Part ii) of the question above is missing:

[ii] Let ABCD be a tetrahedron with A(−4,1,2), B(0,2,−2), C(1,−1,2) and D(1,0,2). Find

(c) The surface area of the side ABC.

(d) The volume of the tetrahedron.

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