题目内容
求∠1、∠2、∠3的度数..

∠1为:180-50-(60+50),
=130-110,
=20(度);
∠2:180-50-20,
=130-20,
=110(度);
∠3:180-50-60,
=130-60,
=70(度);
故答案为:20,110,70.
=130-110,
=20(度);
∠2:180-50-20,
=130-20,
=110(度);
∠3:180-50-60,
=130-60,
=70(度);
故答案为:20,110,70.
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