Answers

2014-07-24T18:40:45+08:00
D² =   a²+b²
     =    87²+136²
D  =   ( √87²+136²)
     =    √26065 =    161.446ft
tanФ =  87/136
     Ф ≈  32.607°
the other angle =  90- 32.607 ≈ 57.393°









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