It doesn't matter on the side length, but it MUST have a right angle.
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You use the pythagorean theorem.
Answers2 + t2 = length of diangnal2
The pythagorean theorem is a+b=c. So, a+b equals two of the three sides. Using your knowledge of what those two sides are will help you with figuring out the third side, but technically, the pythagorean theorem is used only for right triangles. a and b are the two straight sides and c is the diagonal side. your welcome. 8th grader
yes the pythegorean theorem (a2x b2=c2) is used for right triangles a and b are the legs (the sides that make up the right triangle) and c is the hypothenus(the longest side)
The Pythagorean Theorem states that in a right triangle with legs a and b and hypotenuse c, a2 + b2 = c2. The converse of the Pythagorean theorem states that, if in a triangle with sides a, b, c, a2 + b2 = c2 then the triangle is right and the angle opposite side c is a right angle.