What is the length of the third side of a triangle opposite angle 72.23 degrees with two other sides of 7.59cm and 5.67cm?

What is the length of the third side of a triangle opposite angle 72.23 degrees with two other sides of 7.59cm and 5.67cm?
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Answer :

Using the cosine rule of a^2 = b^2 +c^2 -2*b*c*cos(A) intrigonometry the 3rd side of the triangle works out as 7.97cm totwo decimal places
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