It is not possible to determine the measure of an angle if the lengths of two sides are given.
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Any two angles of a triangle determine the third angle. As a result, the side angle angle theorem is equivalent to the angle side angle theorem.
The cosine rule which is: a2 = b2+c2-2*b*c*cosine A This is used to find the third side of a triangle when the two other sides are known along with the angle between them. Used when the triangle is not a right angle.
If it's a right angle triangle then by using Pythagoras' theorem the third side is 17 cm
Using the cosine rule: 13.0112367 cm The triangle is in fact an isosceles triangle.