Mathematics
Junior High
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DE
78,如圖,一人由A地出發,經B、C、D三點時分別向右轉650、750、45°,若行至E點時,應向右偏轉多
度,才能以垂直的路徑回原地A?
(A)750
(B) 80°
(C) 85°
(D)90°
360 - 110-75 = 360-185
=175
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