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将量角器按如图所示的方式放置在三角形纸板上,使点C在半圆上.点A、B的读数分别为...
将量角器按如图所示的方式放置在三角形纸板上,使点C在半圆上.点A、B的读数分别为86°、30°,则∠ACB的大小为( )
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A.15°
B.28°
C.29°
D.34°
考点分析:
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