[填空题]
A lawn sprinkler is setup in t2 w,t9tqdurf,mbzk,. 49 jmha he cor3q +m ov0hmkgbpaxgp(5. )/qlner of a rectangular lawn which is enclosed by a fence. The sprinkler has a maximum spray distance of 5 m. The lawn has side lengths 4 m and 10 m. This situation is illustrated in the diagram below, where th3ma (+plv 5mpkh)/qg.x0boqge sprinkler is positioned in the top right corner.
1.Find the angle $\alpha$ in the diagram, leaving your answer in degrees.$\alpha$= $^{\circ}$
2.Find the area of grass that is currently being watered by the sprinkler
in this position. $m^2$
