What are the coordinates of C in a parallelogram given vertices A, B, and D?

Click For Summary
SUMMARY

The coordinates of point C in parallelogram ABCD can be determined using vector addition based on the given vertices A(-1, 2, -1), B(2, -1, 3), and D(-3, 1, -3). The relationship A - B = D - C establishes that C can be calculated as C = D + (B - A). Substituting the values yields C = (-3, 1, -3) + ((2, -1, 3) - (-1, 2, -1)), resulting in C = (0, 4, 5). This method effectively utilizes the properties of parallelograms to find the unknown vertex.

PREREQUISITES
  • Understanding of vector addition in three-dimensional space
  • Familiarity with the properties of parallelograms
  • Basic knowledge of coordinate geometry
  • Ability to manipulate and solve equations involving vectors
NEXT STEPS
  • Study vector addition and subtraction in R^3
  • Explore the properties of parallelograms and their geometric implications
  • Learn how to derive coordinates of unknown vertices in polygons
  • Practice solving problems involving vector equations and geometric shapes
USEFUL FOR

Students studying geometry, mathematics educators, and anyone interested in understanding vector operations and their applications in three-dimensional space.

Delber
Messages
19
Reaction score
0

Homework Statement


Given a parallelogram ABCD has vertices A(-1,2,-1), B(2,-1,3) and D(-3,1-3). Find the coordinates of C.

Homework Equations





The Attempt at a Solution


I'm extremely confused here. I do not know how to tell which coordinate is for which vertex on the parallelogram. I know this has to do with vector addition, but I can't picture it to solve the problem.
 
Physics news on Phys.org
I believe that the convention is that A -> B -> C -> D -> A will traverse the parallelogram. So C is connected by lines to point D and point B. Hopefully that helps
 
A, B, C are three points in R^3. Imagine there are three points in your room or wherever. They can be connected to form a triangle. Think about how to turn a triangle into a parallelogram. You can get like three different parallelograms, but the question specifies that the parallelogram is ABCD, not ABDC or ACBD. What this means is described by CrazyIvan.

Opposite sides in a parallelogram are parallel and equal in length. So A - B = D - C.
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 16 ·
Replies
16
Views
2K
Replies
11
Views
4K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
1
Views
4K
  • · Replies 3 ·
Replies
3
Views
2K
Replies
2
Views
2K
  • · Replies 10 ·
Replies
10
Views
3K
  • · Replies 2 ·
Replies
2
Views
17K
  • · Replies 8 ·
Replies
8
Views
4K