[填空题]
The diagram below shows a tr7c+ei6x e9*j(go fmtjiangular park Ac s(ssw ao: u95+tsn2qBC. Alice is in the park with her dog. She stops at the corner B of the park to make a phone calqws+s: n(su2 t o9s5cal. The dog's leash is 12 metres long.
1.Find the area of the park that the dog cannot reach when attached to its leash. $m^2$
2.Determine the percentage of total park area that the dog can reach while attached to its leash %
