round the answers solve the triangles A = 42 degrees, B = 61 degrees, a = 12 i solved for the other 2, C and b, but for c on the answer sheet it says 17 but when solving with my calculator it gave me 18.31489... could I have made any errors or the answer sheet gave an error

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter65: Achievement Review—section Six
Section: Chapter Questions
Problem 20AR: The cross section of a dovetail slide is shown. Before the dovetail was cut, the cross section was...
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round the answers

solve the triangles

A = 42 degrees, B = 61 degrees, a = 12

i solved for the other 2, C and b, but for c on the answer sheet it says 17 but when solving with my calculator it gave me 18.31489... could I have made any errors or the answer sheet gave an error

 

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i got those 2 already but I was looking the answer on lowercase c

the answer shown on my textbook for lowercase c says 17 but my calculator gave my 18.31489...

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