[填空题]
A ladder 3.7 m long leans against a vertical wall. The distap-;s qlvo s10tz2jgs;nce fro.1sc(m m5 yrvy 6v,uvpm the top of the ladder to thecv.5pu, vmyv1my(6sr ground is 3.1 m.
1.Represent this information on a diagram in the space provided above. Show the ground, the ladder and the wall as the labelled line segments.
2.Find the distance from the bottom of the ladder to the wall. m
3.Write down the acute angle made by the ladder with the wall. $^{\circ}$
