In triangle ABCABCABC, AB=7AB = 7AB=7 cm, BC=10BC = 10BC=10 cm and angle ABC=115°ABC = 115°ABC=115°.
Calculate the side opposite the 115° 115°\,115° angle, ACACAC, to 3 significant figures.
Determine the area enclosed by the three sides, to 3 significant figures.