Question

Two sides of a ^ are of length 5cm and 12 cm. If the length of the third side is x cm then

Answer 1

If it's a right angled triangle then the formula a^2 + b^2 = c^2 will be applied and if it's not a right angled triangle then we need to know the angle ( X ) between the two known sides, then the formula c^2 = a^2 + b^2 - 2abCosX should be applied. But u didn't mention the type of triangle or anything about the angle, so I can't solve but I gave the formula above.
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Hope it'll help you...