[填空题]
A ladder 3.7 m long leans against oh dsi32 ;i+caa vertical wall. The distance from the top oxg28 dovb1d k3s4 a5hff t had4fd 52bkv8 1s3xoghe ladder to the 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. $^{\circ}$
