b-a=15 a=b-15
c-b=60 c=b+60
a+b+c=180 (b-15)+(b+60)+b=3b+45=180 b=45
a=30 c=105
在角abc中,已知角b減角a等于15度,角c減角b等于60度,求角a角b角c度數(shù).
在角abc中,已知角b減角a等于15度,角c減角b等于60度,求角a角b角c度數(shù).
數(shù)學(xué)人氣:162 ℃時間:2020-08-31 00:41:15
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