[填空题]
Joe creates a small baseball fie z keoletwq.*-(9 mu-,)wp eylld in his backyard to play with his chiltvks8 s94tkqw6hu9 4ndren. The field is covered by grass in the shape of a sector of a circle with radius 8 metres, as shown in the following diagram. The angle at the centre of the sector 4kn9 qt 6us9ts4hkwv 8is $\theta^{\circ}$
A total of $48 m^2$ of grass was used to cover the field.
1.Find the value of $\theta$. $^{\circ}$
Joe asks his son, Lancer, to run around the field twice to warm up before playing a game.
1.Find the total distance that Lancer runs.d= m
