
Trigonometry (11th Edition)
11th Edition
ISBN: 9780134217437
Author: Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher: PEARSON
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![### Example 2: Calculate the Area of Triangle ABC
Given the following coordinates, calculate the area of the triangle formed by the points A, B, and C:
#### Option A
- \( A(2, 1, 1) \)
- \( B(4, 3, 0) \)
- \( C(1, 3, -2) \)
#### Option B
- \( A(0, 0, 0) \)
- \( B(-1, 2, 3) \)
- \( C(1, 2, 6) \)
#### Option C
- \( A(1, 3, 2) \)
- \( B(2, -1, 0) \)
- \( C(1, 10, 6) \)
Use the determinant method for calculating the area of a triangle in three-dimensional space. If the coordinates of the vertices are \( A(x_1, y_1, z_1) \), \( B(x_2, y_2, z_2) \), and \( C(x_3, y_3, z_3) \), then the area of triangle ABC is given by:
\[
\text{Area} = \frac{1}{2} \left| \begin{vmatrix}
x_1 & y_1 & z_1 & 1 \\
x_2 & y_2 & z_2 & 1 \\
x_3 & y_3 & z_3 & 1 \\
\end{vmatrix} \right|
\]
### Steps for Calculation:
1. Form the matrix using the coordinates of the given points.
2. Compute the determinant of the formed matrix.
3. Apply the formula to find the area of the triangle.](https://content.bartleby.com/qna-images/question/dff7b543-7c53-4567-b2e2-82ba64a4a215/eb3a1d45-3f00-4dd3-93a4-42f6fae937b3/t3hgf5h_thumbnail.png)
Transcribed Image Text:### Example 2: Calculate the Area of Triangle ABC
Given the following coordinates, calculate the area of the triangle formed by the points A, B, and C:
#### Option A
- \( A(2, 1, 1) \)
- \( B(4, 3, 0) \)
- \( C(1, 3, -2) \)
#### Option B
- \( A(0, 0, 0) \)
- \( B(-1, 2, 3) \)
- \( C(1, 2, 6) \)
#### Option C
- \( A(1, 3, 2) \)
- \( B(2, -1, 0) \)
- \( C(1, 10, 6) \)
Use the determinant method for calculating the area of a triangle in three-dimensional space. If the coordinates of the vertices are \( A(x_1, y_1, z_1) \), \( B(x_2, y_2, z_2) \), and \( C(x_3, y_3, z_3) \), then the area of triangle ABC is given by:
\[
\text{Area} = \frac{1}{2} \left| \begin{vmatrix}
x_1 & y_1 & z_1 & 1 \\
x_2 & y_2 & z_2 & 1 \\
x_3 & y_3 & z_3 & 1 \\
\end{vmatrix} \right|
\]
### Steps for Calculation:
1. Form the matrix using the coordinates of the given points.
2. Compute the determinant of the formed matrix.
3. Apply the formula to find the area of the triangle.
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