 # How Do You Find The Length Of The Third Side Of A Triangle?

## How do I find the third side of a triangle?

Draw the triangle on your paper labeling the two sides adjacent to the right angle, or legs, “​a​” and “​b​.” Label the hypotenuse, or third side “​c​.” This is the Pythagorean Theorem used for solving for the unknown side..

## How do you find the exact length of the third side?

The length of unknown third side of right triangle can be found by using Pythagoras theorem. a = √(c^2 – b^2) is the formula to find the length a:, b = √(c^2 – a^2) is the formula to find the length b: and c = √(a^2 + b^2) is the formula to find the length c:.

## How do you find the third side of a triangle given two sides?

This means we are given two sides and one angle that is not the included angle. In this case, use The Law of Sines first to find either one of the other two angles, then use Angles of a Triangle to find the third angle, then The Law of Sines again to find the final side.

## How do you find the length of a triangle given two sides and an angle?

Solving SAS Trianglesuse The Law of Cosines to calculate the unknown side,then use The Law of Sines to find the smaller of the other two angles,and then use the three angles add to 180° to find the last angle.

## How do you find the length of a side of a triangle using trigonometry?

Sin, Cos and TanThe sine of the angle = the length of the opposite side. the length of the hypotenuse.The cosine of the angle = the length of the adjacent side. the length of the hypotenuse.The tangent of the angle = the length of the opposite side. the length of the adjacent side.

## How do you find the missing side of a triangle using the Pythagorean Theorem?

The Pythagorean theorem states that a2 + b2 = c2 in a right triangle where c is the longest side. You can use this equation to figure out the length of one side if you have the lengths of the other two.

## How do you find the length of the sides of a triangle?

Right Triangles and the Pythagorean TheoremThe Pythagorean Theorem, a2+b2=c2, a 2 + b 2 = c 2 , can be used to find the length of any side of a right triangle.The side opposite the right angle is called the hypotenuse (side c in the figure).More items…

## How do you find the minimum and maximum length of the third side of a triangle?

By the Triangle Inequality Theorem, the sum of lengths of any two sides of a triangle is greater than the length of the third side. So, The minimum would be 6 and the maximum would be 20.

## How do you find the third side of an obtuse triangle?

You can use the pythagorean theorem to see where the angle between the first two sides would be 90 degrees. Third side = sqrt(16^2 + 21^2) = 26.4.

## Which is the length of the third side of the right triangle?

The side opposite the right angle is the hypotenuse. The Pythagorean theorem is used to solve for the length of the hypotenuse. If a right triangle has legs measuring a and b with hypotenuse c, the Pythagorean theorem is a² + b² = c².