December 30, 2022

Distance Between Two Points - Formula, Derivation, Examples

The concept of distance is crucial in both


and daily life. From simply calculating the extent of a line to working out the quickest route among two points, comprehending the length among two points is vital.

In this blog article, we will explore the formula for distance between two points, review a few examples, and discuss real-life applications of this formula.

The Formula for Distance Within Two Locations

The length between two points, frequently denoted as d, is the extent of the line segment connecting the two extremities.

In math, this can be portrayed by drawing a right triangle and employing the Pythagorean theorem. According to Pythagorean theorem, the square of the distance of the longest side (the hypotenuse) is equal to the total of the squares of the distances of the two other sides.

The formula for the Pythagorean theorem is a2 + b2 = c2. As a result, √c2 will as same as the length, d.

In instance of finding the distance within two points, we can represent the points as coordinates on a coordinate plane. Let's assume we possess point A with coordinates (x1, y1) and point B at (x2, y2).

We could then utilize the Pythagorean theorem to acquire the ensuing formula for distance:

d = √((x2 - x1)2 + (y2 - y1)2)

In this formula, (x2 - x1) depicts the distance on the x-axis, and (y2 - y1) portrays the length along y-axis, forming a right angle. By taking the square root of the sum of their squares, we obtain the distance between the two points.

Here is a visual depiction:

Examples of Using the Distance Formula

Considering we possess the formula for distance, let's check out few examples of how it can be used.

Calculating the Length Among the Two Locations on a Coordinate Plane

Assume we possess two locations on a coordinate plane, A with coordinates (3, 4) and B with coordinates (6, 8). We will use the distance formula to calculate the length between these two points as follows:

d = √((6 - 3)2+ (8 - 4)2)

d = √(32 + 42)

d = √(9 + 16)

d = √(25)

d = 5

Consequently, the distance between points A and B is 5 units.

Calculating the Length Among Two Points on a Map

In addition to finding distances on a coordinate plane, we can further use the distance formula to work out lengths between two locations on a map. For instance, assume we posses a map of a city with a scale of 1 inch = 10 miles.

To work out the distance within two locations on the map, such as the city hall and the airport, we can easily measure the length among the two points using a ruler and change the measurement to miles using the map's scale.

While we calculate the length between these two points on the map, we find it is 2 inches. We convert this to miles using the map's scale and find out that the true length between the airport and the city hall is 20 miles.

Determining the Distance Within Two Points in Three-Dimensional Space

In addition to calculating distances in two dimensions, we can also use the distance formula to work out the length between two points in a three-dimensional space. For example, assume we possess two points, A and B, in a three-dimensional space, with coordinates (x1, y1, z1) and (x2, y2, z2), individually.

We will use the distance formula to work out the length between these two locations as ensuing:

d = √((x2 - x1)2 + (y2 - y1)2 + (z2 - z1)2)

Utilizing this formula, we can calculate the distance within any two locations in three-dimensional space. For example, if we have two locations A and B with coordinates (1, 2, 3) and (4, 5, 6), individually, we can figure out the length between them as ensues:

d = √((4 - 1)2 + (5 - 2)2 + (6 - 3)2)

d = √(32 + 32 + 32)

d = √(9 + 9 + 9)

d = √(27)

d = 3.16227766

Hence, the distance within locations A and B is just about 3.16 units.

Uses of the Distance Formula

Now once we have seen some examples of using the distance formula, let's explore few of its uses in math and other fields.

Calculating Length in Geometry

In geometry, the distance formula is utilized to work out the length of line segments and the sides of triangles. For instance, in a triangle with vertices at points A, B, and C, we use the distance formula to figure out the distances of the sides AB, BC, and AC. These distances could be utilized to measure other properties of the triangle, for instance its area, perimeter and its interior angles.

Solving Problems in Physics

The distance formula is further employed in physics to solve questions concerning speed, distance and acceleration. For example, if we perceive the first location and velocity of an object, in addition to the time it takes for the object to transport a certain length, we could use the distance formula to work out the object's concluding location and speed.

Analyzing Data in Statistics

In statistics, the distance formula is usually used to calculate the distances within data points in a dataset. This is beneficial for clustering algorithms, that group data points that are near to each other, and for dimensionality reduction techniques, this represent high-dimensional data in a lower-dimensional space.

Go the Distance with Grade Potential

The distance formula is an important theory in math which enables us to calculate the length between two location on a plane or in a three-dimensional space. By utilizing the Pythagorean theorem, we can extract the distance formula and implement it to a variety of scenarios, from calculating length on a coordinate plane to analyzing data in statistics.

Understanding the distance formula and its applications are essential for anyone interested in math and its uses in other areas. If you're having difficulties with the distance formula or any other mathematical concept, reach out to Grade Potential tutoring for customized help. Our professional instructors will assist you master any math topic, from algebra to calculus and furthermore.

Connect with us today to know more and schedule your first tutoring session.