如圖所示，唐笑正在操場上放風箏。

22.(1)在Rt△BPQ中，PQ = 10m，∠ B = 30，則BQ = Cot30× PQ = 103..................................................................................................................................................................................∴AE = sin 30×ab = 12(103+10)............................................................................................................................................................................................................................................................................................∴AC=2(53+5)=(56+52)(米)..................∴a2–B2 =(2b)2–B2 = B2 = BC......................小明的推測是正確的...........................................................................................................................................................................................................................................................................................................................................................6?2ACD是等腰三角形。∴∠ BAC = 2 ∠ ACD，而∠BAC=2∠B，∴∠B=∠ACD=∠D，？6?2∴CBD是等腰三角形，即CD=CB=a，D = ∠ 6點。6?2∴ACD？6?2∽CBD，7分∴ ADCCDBD =。也就是baabc =+c=10。10