118°12'-37°37'x2=117°72'-75°14'=42°58'，你好，本题已解答,如果满意请点右下角“采纳答案”。
118°12'-37°37'×2=118°12'-74°74'=117°72'-75°14'=42°58'(118°12'-37°37')×2=(117°72'-37°37')×2=80°35'×2=160°70'=161°10'
