Chapter 7: Problem 21
Find the distance between the given points. $$ (3,-1,2),(6,4,8) $$
Short Answer
Expert verified
The distance is \(\sqrt{70}\) or approximately 8.37.
Step by step solution
01
Identifying the Points
We are given two points in a three-dimensional space: Point A at \((3,-1,2)\) and Point B at \((6,4,8)\).
02
Using the Distance Formula
The distance formula for two points \((x_1, y_1, z_1)\) and \((x_2, y_2, z_2)\) in three-dimensional space is given by:\[d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2 + (z_2 - z_1)^2}\]
03
Substituting the Coordinates
Substitute the given coordinates into the formula. For Point A \((x_1, y_1, z_1) = (3,-1,2)\) and Point B \((x_2, y_2, z_2) = (6,4,8)\), the formula becomes:\[d = \sqrt{(6 - 3)^2 + (4 - (-1))^2 + (8 - 2)^2}\]
04
Calculating the Differences
Calculate each component difference: \[(6 - 3)^2 = 3^2 = 9,\]\[(4 - (-1))^2 = (4 + 1)^2 = 5^2 = 25,\]\[(8 - 2)^2 = 6^2 = 36\]
05
Finding the Sum
Add the squared differences together:\[9 + 25 + 36 = 70\]
06
Calculating the Distance
Take the square root of the sum to find the distance:\[d = \sqrt{70}\]
07
Simplifying the Result
The exact distance between the points cannot be further simplified and is approximately 8.37 when rounded to two decimal places.
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
three-dimensional distance
Understanding three-dimensional distance is crucial when navigating 3D space. This concept involves calculating the distance between two points in a space that doesn't lie flat on a page. In three-dimensional space, we deal with
- x
- y
- z coordinates.
- Follow a formula similar to the Pythagorean theorem but in three dimensions.
- Use the distance formula to capture how far apart two points are within a 3D grid. For any two points \((x_1, y_1, z_1)\) and \((x_2, y_2, z_2)\), the formula becomes:\[d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2 + (z_2 - z_1)^2}\]
coordinate geometry
Coordinate geometry is a powerful tool used to find points, angles, and lengths within a defined space. It forms the bedrock for solving many geometric problems using algebraic techniques. In three-dimensional space:
- We use coordinate planes like \(xy\), \(yz\), and \(zx\), where each plane consists of an axis pair.
- Objects and points align themselves according to these axes, helping define their location in space.
- This coordination begins by identifying initial and terminal coordinates for each dimension.
- Then we can employ the distance formula from three-dimensional distance to pragmatic use.
3D space calculations
Performing calculations in 3D space might seem daunting, but understanding the fundamental principles breaks down complexities. In 3D calculations, we focus on:
- How coordinates interact across three dimensions.
- How to harness patterns and formulas to resolve spatial challenges.
- Start with identifying known coordinates of given points. The clarity in initial data simplifies further computation.
- Plug these values into formulas—like the three-dimensional distance formula—to find required distances.
- Understand that each step involves partial computations of axis differences and their effects, leading up to comprehensive results through squaring and square root operations.
- This cycle of operations forms the foundation of sizing up distances or finding midpoints across any part of the 3D space.