Calculate triangle side length

If I'm given a right triangle and two of its sides, how can I find the length of the third side?

The sides of a triangle are straight lines that are joined by the three vertices of the triangle. In other words, we can say that the sides of a triangle are line segments that meet each other at the vertices of the triangle. The sides of a right-angled triangle can be found out by using various methods like the Pythagoras theorem or by using the perimeter of the triangle. In case some of the angles and other side lengths are given, we can use the law of cosines or the law of sines to find the lengths of the sides of a triangle. In this article, we will explore the concept of the sides of a triangle along with its formula.

Calculate triangle side length

Finding the missing side or angle couldn't be easier than with our great tool — right triangle side and angle calculator. Choose two given values, type them into the calculator, and the calculator will determine the remaining unknowns in a blink of an eye! If you are wondering how to find the missing side of a right triangle, keep scrolling, and you'll find the formulas behind our calculator. There are a few methods of obtaining right triangle side lengths. Depending on what is given, you can use different relationships or laws to find the missing side:. If you know two other sides of the right triangle, it's the easiest option; all you need to do is apply the Pythagorean theorem:. If leg a is the missing side, then transform the equation to the form where a is on one side and take a square root:. As we remember from basic triangle area formula , we can calculate the area by multiplying the triangle height and base and dividing the result by two. A right triangle is a special case of a scalene triangle, in which one leg is the height when the second leg is the base, so the equation gets simplified to:. For example, if we know only the right triangle area and the length of the leg a , we can derive the equation for the other sides:. If you know one angle apart from the right angle, the calculation of the third one is a piece of cake:. However, if only two sides of a triangle are given, finding the angles of a right triangle requires applying some basic trigonometric functions:. To solve a triangle with one side, you also need one of the non-right angled angles. If not, it is impossible:. Assume we want to find the missing side given area and one side.

If you know two other sides of the right triangle, it's the easiest option; all you need to do is apply the Pythagorean theorem:.

Omni's triangle side calculator allows you to calculate the length of the sides of a triangle. There are several methods to find the missing side of a triangle. Depending upon the type of given information, you can choose one of the following:. If we know, the measurements of the two sides and the opposite angle to one of them , we can use the Law of Sines to find the missing side. On the other hand, if we know two sides and the angle between them , we can use the Law of Cosines to find the remaining side. Hence if we know the measurement of the two angles, we can find the third angle using the equation:.

The triangle length calculator tells you the length of the third side if you enter two sides and an angle. A triangle has three sides and three angles. To this end, you need to employ a sine law or the cosine law to relate them to each other. Sine or cosine forms the crux of trigonometry functions that have numerous applications. One is about finding the third side or any angle for a triangle: the calculator and the accompanying text do the same. Read on to understand more about triangle length and cosine law. The sides of the triangle are related to each other with the cosine law :.

Calculate triangle side length

Omni's triangle side calculator allows you to calculate the length of the sides of a triangle. There are several methods to find the missing side of a triangle. Depending upon the type of given information, you can choose one of the following:. If we know, the measurements of the two sides and the opposite angle to one of them , we can use the Law of Sines to find the missing side.

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To calculate the triangle side lengths, we will proceed as follows: Using the angle sum property of a triangle, we will solve for the third angle:. The sides of a right triangle are commonly referred to with the variables a, b, and c, where c is the hypotenuse and a and b are the lengths of the shorter sides. The inradius is the perpendicular distance between the incenter and one of the sides of the triangle. But -- what if it's not a right triangle? Omni's triangle side calculator allows you to calculate the length of the sides of a triangle. The circumradius is defined as the radius of a circle that passes through all the vertices of a polygon, in this case, a triangle. Here's an example:. Possible Answers: Or maybe you're on a deadline? Hence, all the sides will be of the same length, i. Question: If I'm given a right triangle and two of its sides, how can I find the length of the third side? We need to find the side 'a'.

Please provide 3 values including at least one side to the following 6 fields, and click the "Calculate" button. A triangle is a polygon that has three vertices.

Are all right triangles similar? Company name. Cuboid Calculator. Correct answer: 9, 12, The sum of both legs squared equals the hypotenuse squared. Privacy Policy. Sides of Triangle The sides of a triangle are straight lines that are joined by the three vertices of the triangle. To find the sides of a triangle, we use different formulas depending upon the known values for the given triangle. Explanation : Use the Pythagorean theorem:. Depending on what is given, you can use different relationships or laws to find the missing side: 1. Table of contents: How to find the sides of a right triangle How to find the angle of a right triangle How do you solve a right angle triangle with only one side? Now we can solve for the missing side. How to find the angle? The rule of the sides of a triangle is that the sum of the lengths of any two sides of a triangle is always greater than the length of the third side.