[填空题]
Two hot air balloons, located atv xwd l p6:0be4lfg-2w(ea dw hi+w; d3ak(a ylm kd74vsn3w42 points A and B, float in the sky 50 m apart from easla kk he(42 dw73dndwa(a v w4+;3miych other on the same height above a flat (horizontal) ground. Two straight ropes, AP and BP, are attached to the same point, P, on the ground. The length of AP is
36m and angle $\mathrm{A}\hat{\mathrm{B}}\mathrm{P}$ is $45^{\circ}$.
1.On the diagram, draw and label with an $\alpha$ the angle of elevation of A Angle APB is acute.
2.Find the size of angle $\mathrm{A}\hat{\mathrm{P}}\mathrm{B}$. $^{\circ}$
3.Find the size of the angle of elevation of A from P. $^{\circ}$
