December 30, 2022

Distance Between Two Points - Formula, Derivation, Examples

The theory of distance is vital in both


and routine life. From straightforward calculating the extent of a line to designing the shortest route between two extremities, comprehending the distance among two points is important.

In this blog, we will inspect the formula for distance between two points, review some examples, and talk about realistic uses of this formula.

The Formula for Distance Within Two Points

The length among two points, frequently indicated as d, is the extent of the line segment linking the two points.

Mathematically, this could be represented by drawing a right triangle and using the Pythagorean theorem. Per the Pythagorean theorem, the square of the length of the extensive side (the hypotenuse) is equivalent 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 consequence, √c2 will as same as the distance, d.

In instance of working out the distance between two locations, we could portray the extremities as coordinates on a coordinate plane. Let's say we have point A with coordinates (x1, y1) and point B at (x2, y2).

We could then use the Pythagorean theorem to derive the following formula for distance:

d = √((x2 - x1)2 + (y2 - y1)2)

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

Here is a visual illustration:

Instances of Using the Distance Formula

Now that we possess the formula for distance, let's look at few examples of how it can be used.

Working out the Length Between Two Points on a Coordinate Plane

Assume we have two points on a coordinate plane, A with coordinates (3, 4) and B with coordinates (6, 8). We will utilize the distance formula to find the length within these two locations as ensues:

d = √((6 - 3)2+ (8 - 4)2)

d = √(32 + 42)

d = √(9 + 16)

d = √(25)

d = 5

Consequently, the length within points A and B is 5 units.

Calculating the Distance Within Two Locations on a Map

In addition to finding distances on a coordinate plane, we can also use the distance formula to figure out distances within two locations on a map. For instance, assume we posses a map of a city along a scale of 1 inch = 10 miles.

To figure out the length within two points on the map, for instance the airport and the city hall, we could easily work out the distance within the two points employing a ruler and convert the measurement to miles using the map's scale.

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

Determining the Distance Among Two Points in Three-Dimensional Space

In addition to finding distances in two dimensions, we could also utilize the distance formula to calculate the length among two locations in a three-dimensional space. For instance, assume we possess two locations, A and B, in a three-dimensional space, with coordinates (x1, y1, z1) and (x2, y2, z2), respectively.

We will employ the distance formula to work out the length within these two locations as ensuing:

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

Utilizing this formula, we could determine the length between any two points in three-dimensional space. For example, if we possess two locations A and B with coordinates (1, 2, 3) and (4, 5, 6), respectively, we could work out the distance among 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

Therefore, the length within locations A and B is roughly 3.16 units.

Applications of the Distance Formula

Now once we have looked at few examples of utilizing the distance formula, let's explore few of its applications in math and other areas.

Measuring Distances in Geometry

In geometry, the distance formula is utilized to measure the distance of line segments and the sides of triangles. For example, 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 lengths can be used to measure other properties of the triangle, for instance its perimeter, area, and interior angles.

Solving Problems in Physics

The distance formula is also utilized in physics to figure out problems concerning distance, speed, and acceleration. For example, if we know the original location and velocity of an object, as well as the time it takes for the object to transport a certain distance, we could use the distance formula to work out the object's final location and speed.

Analyzing Data in Statistics

In statistics, the length formula is often used to workout the length within data points in a dataset. This is useful for clustering algorithms, that segregate data points which are near to each other, and for dimensionality reduction techniques, which represent high-dimensional data in a lower-dimensional space.

Go the Distance with Grade Potential

The distance formula is an important theory in math that allows us to figure out the between two location on a plane or in a three-dimensional space. By utilizing the Pythagorean theorem, we could obtain the distance formula and apply it to a variety of situations, from calculating length on a coordinate plane to analyzing data in statistics.

Understanding the distance formula and its uses are important for anyone fascinated in mathematics and its applications in other areas. If you're struggling with the distance formula or any other math theories, contact Grade Potential tutoring for tailored help. Our experienced teachers will assist you master any mathematics topic, from algebra to calculus and furthermore.

Contact us right now to learn more and schedule your first tutoring session.