Answer:
CA ≈ 10 cm
Step-by-step explanation:
Since we know 2 sides and 1 angle we can use the Law of Cosine to find the third side.
CA = √(AB²+CB²- 2· AB· CB· cos 50°)
CA = √(7² +13² -2·7·13· cos 50°)
CA = √(49 +169 -116.987345)
CA = √101.012655
CA = 10.0505
CA ≈ 10 cm
