[填空题]
Paper party cups in the shape of a cone are formed from a g;.w:3uwbo3s ks nd+ zsefa b5u(h9ob .+yhw 9w2wzlg c7ctor of paper material. The diagram below left w. ho gbzbu79 cf(95ya2+w wlhshows the finished paper cup. The diagram below right shows the original paper sector used to create the cup. When the cones are formed, the straight edges of the sector join without any overlap.
1.Find the slant height of the cups, L. cm
2.Find the arc length of the sector. cm
3.Find the angle $\theta$ in radians. radians