if you know the length of 2 sides of a triangle how do you come up with the 3rd side lenght?

Answer 1

well, if it's a right triangle then you can use the pythagorean theory. Otherwise, you can use sine, cosine, or tangent if you have a calculator.

Answer 2

welll, say you have a right triangle where the sides are not the same length. You would find the squares of the two sides you know, either add or subtract them (depending on how big they are), and then you have the square of the third side. All you gotta do next is take the square root of that and you have the 3rd side.

Answer 3

It depends on if it's a right triangle -- it's much easier if it is!

Right Triangle: Give the two sides next to the right angle "a" and "b". The other is the hypotenuse & it is "c". a*a + b*b = c*c

Other Triangle: You have to use the trigonometric functions and know an angle measure.
sin=opposite/hypoteneuse cos=adjacent/hypoteneus tan=opposite/adjacent
Where opposite is the side opposite of the angle known and adjacent is the side adjacent to the known angle without being the hypoteneuse. Sorry, its confusing in know! I don't know an easier way!

Answer 4

a ruler would work


JK



you have to know the angle of the triangle also

Answer 5

if it's a right triangle a squared plus b squared equals c (hypotenuse) squared

otherwise you need angels and use the cosine formula

Answer 6

ok i kno this may sound weird from a 13yr old but you can use the pythagorean theorum a2+b2=c2 (2=square)

Answer 7

IT WOULD BE THE SAME AS THE OTHER 2 AS EACH SIDE IS EXACTLY THE SAME

Answer 8

It is impossible. You need the angle first.