9514 1404 393
Answer:
a ≈ 12.8
Explanation:
To find 'a' using the law of sines, we need the measure of the angle opposite a given side. Here, that would be angle C.
C = 180° -A -B = 180° -45° -25° = 110°
Now, we can find 'a' to be ...
a/sin(A) = c/sin(C)
a = c·sin(A)/sin(C) = 17·sin(45°)/sin(110°)
a ≈ 12.7923
a ≈ 12.8 . . . . rounded to tenths