To find this you'll need to know the lengths of the other two (or possibly a couple of angles). The basic formula is Pythagorean Theorum is:
A (squared) + B (squared) = C (squared) with C being the longest side. Just
plug in the length of the two sides you know and solve for the third.
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the perimeter of a triangle is 86 inches. the largest side is four inches less than twice the smallest side. the third side is 10 inches longer than the smallest side. what is the length of each side?
If two sides of a triangle have lengths of 5cm and 12cm, then the third side can have any length that's more than 7cm and less than 17cm. If the third side is 13cm, then the triangle is a right triangle.
Oh, what a happy little triangle we have here! To find the possible length of the third side, we can use the triangle inequality theorem. The third side must be greater than the difference between the other two sides and less than the sum of the other two sides. So, the third side could be any length between 5 and 19 units.
To find the scale factor of two triangles, look first for one pair of corresponding sides--one side from the smaller triangle and the corresponding side from the larger triangle. Divide the larger side length by the smaller side length, and that quotient is your scale factor.
The third side must be longer than 11 and shorter than 19.