[填空题]
Paper party cups in the shape0iq hz4-jc j;0eiji.l of a cone are formed from a sector of paper ma(gck vaoh1,*qmp ni w1w7 n)0hterial. The diagram below left shows the finished p0c)w i 7*m(hvag1nho1wnq kp,aper 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