Chapter 1: Problem 51
Find the distance between each pair of points. Then find the coordinates of the midpoint of the line segment between the points. $$E(-3,-2), F(5,8)$$
Short Answer
Expert verified
The distance between E and F is approximately 12.81, and the midpoint is (1, 3).
Step by step solution
01
Understanding the Distance Formula
To find the distance between two points, \((x_1, y_1)\) and \((x_2, y_2)\), use the distance formula: \[d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}\].
02
Substitute the Coordinates of Points E and F into the Distance Formula
Here, point \(E\) has coordinates \((-3, -2)\) and point \(F\) has coordinates \((5, 8)\). Substitute these into the distance formula: \[d = \sqrt{(5 - (-3))^2 + (8 - (-2))^2}\].
03
Calculate the Differences in Coordinates
Calculate \((5 - (-3))\) and \((8 - (-2))\):- \(5 - (-3) = 5 + 3 = 8\)- \(8 - (-2) = 8 + 2 = 10\)
04
Compute the Squared Values
Now, calculate the squares of these differences: - \(8^2 = 64\)- \(10^2 = 100\)
05
Find the Sum and the Square Root
Add these squared values and find the square root to get the distance: \[d = \sqrt{64 + 100} = \sqrt{164}\].Thus, the distance is \(\sqrt{164}\), which approximately equals \(12.81\).
06
Understanding the Midpoint Formula
To find the midpoint of a line segment between two points, use the midpoint formula: \(M = \left(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2}\right)\).
07
Substitute the Coordinates of Points E and F into the Midpoint Formula
Substitute the coordinates \((-3, -2)\) and \((5, 8)\) into the formula: \[M = \left(\frac{-3+5}{2}, \frac{-2+8}{2}\right)\].
08
Calculate the Midpoint Coordinates
Perform the calculations for each coordinate:- \(\frac{-3+5}{2} = \frac{2}{2} = 1\)- \(\frac{-2+8}{2} = \frac{6}{2} = 3\)Thus, the coordinates of the midpoint are \((1, 3)\).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Coordinate Geometry
Coordinate Geometry is a branch of geometry where we use coordinate planes to analyze geometric locations. It involves placing points on the plane using ordered pairs, known as coordinates.
Each point on a coordinate plane is represented by a pair
- The first number in the pair denotes the horizontal position (x-coordinate).
- The second number gives the vertical position (y-coordinate).
Distance Formula
The Distance Formula is a tool in coordinate geometry used to find the distance between two points in a coordinate plane. We use it when points are defined by their coordinates To use the distance formula, follow these steps:
- Identify the coordinates of the points, say - Point 1 as \((x_1, y_1)\)
- Point 2 as \((x_2, y_2)\)
Midpoint Formula
The Midpoint Formula allows us to determine the point that divides a line segment into two equal parts. It's particularly useful in coordinate geometry for identifying the center point between two endpoints.When you want to find a midpoint, follow these simple steps:
- Start with the coordinates of points A and B defined as:
- Point A \((x_1, y_1)\)
- Point B \((x_2, y_2)\)