Third Leg of a Triangle Calculator

FAQs

Calculate length of side triangle
To find the length of a side in a triangle, you can use the Law of Cosines if you know two sides and the angle between them. For a right triangle, you can use the Pythagorean theorem if two sides are known.

Calculate third side of triangle
To calculate the third side of a triangle:

• For non-right triangles, use the Law of Cosines, which states that the third side can be found by combining the squares of the other two sides and adjusting for the angle between them.
• For right triangles, use the Pythagorean theorem by adding the squares of the two shorter sides and finding the square root of that result.

Right triangle calculator with steps
A right triangle calculator can help find missing sides or angles step-by-step. This usually involves using the Pythagorean theorem or trigonometric functions like sine, cosine, and tangent for angles and side lengths.

Find height of right triangle
To find the height or altitude of a right triangle relative to a specific base, you can use basic trigonometry if an angle is known or calculate the perpendicular distance using the Pythagorean theorem if only the sides are known.

Calculating side of triangle
For non-right triangles, use the Law of Cosines or Sines. For right triangles, use the Pythagorean theorem or trigonometry functions depending on the angles and sides available.

One side angle triangle calculator
This type of calculator requires at least one side and one angle to calculate other dimensions using trigonometry functions like sine, cosine, or tangent, which relate the angle to the lengths of the triangle’s sides.

Right triangle calculator with pi
A calculator with pi is useful in trigonometry to express angles in radians. This can be helpful for solving right triangles when angles are given in terms of pi rather than degrees.

How do you find the third leg of a triangle?
To find the third leg or side of a triangle, use the Pythagorean theorem if it is a right triangle. For other triangles, use the Law of Cosines if two sides and the included angle are known.

How to figure out the third angle of a triangle?
The third angle of a triangle can be found by subtracting the sum of the two known angles from one hundred eighty degrees.

How do you find the third part of a triangle?
To find any unknown part of a triangle, whether it be a side or an angle, use known trigonometry rules. For example, you can use the Law of Sines, Law of Cosines, or simple angle-sum properties.

What is the formula to find the missing leg of a triangle?
For a right triangle, the Pythagorean theorem allows you to find the missing leg by taking the square root of the difference between the square of the hypotenuse and the square of the known leg.

What is the formula for the third side of a triangle?
The Law of Cosines is used to calculate the third side of a triangle when you know two sides and the included angle. For a right triangle, use the Pythagorean theorem.

How to find the third side of a triangle that isn’t right?
To find the third side of a non-right triangle, use the Law of Cosines when you know two sides and the included angle.

What is the formula for third angle?
The third angle can be found by subtracting the sum of the two known angles from one hundred eighty degrees, based on the fact that the sum of all angles in a triangle is always one hundred eighty degrees.

How to find the third side of a triangle of a scalene triangle?
For a scalene triangle where none of the sides or angles are equal, use the Law of Cosines if two sides and an angle between them are known.

Can you find the side of a triangle with three angles?
If only three angles are known and no side lengths, it is impossible to determine the exact side lengths, as there is no specific scale without at least one side measurement.

How do you find the missing part of a triangle?
To find a missing side or angle, use the Law of Sines or the Law of Cosines, depending on the known parts of the triangle. For right triangles, trigonometric ratios like sine, cosine, and tangent can also be applied.

How do you find the third side of a triangle in a rectangle?
If the triangle is inside a rectangle and forms a right triangle, use the Pythagorean theorem to find the third side.

How to find the third side of a triangle using trigonometry?
Use the Law of Cosines, which relies on trigonometric functions, if you know two sides and the angle between them. This is helpful in cases where the triangle is not a right triangle.

How do you find the third side of a right triangle?
To find the third side of a right triangle, use the Pythagorean theorem if the other two sides are known.

What is the leg theorem of a triangle?
The leg theorem states that, in a right triangle, each leg is the geometric mean of the hypotenuse and the projection of that leg onto the hypotenuse. This theorem is part of triangle similarity properties.

How do you find the long leg of a triangle with the short leg?
In a right triangle, if you know one leg and the angle opposite that leg, use trigonometric ratios to find the other leg. For example, the tangent of the angle is the ratio of the opposite side to the adjacent side.

How to find the third side of a triangle with two equal sides?
If two sides are equal and the angle between them is known, use the Law of Cosines. If the two equal sides do not include the angle, then use the Law of Sines.

What is the third side rule of a triangle?
The triangle inequality rule states that the length of any one side of a triangle must be less than the sum of the other two sides.