求出下面各三角形中未知角的度数．
直接写出得数 ．
直接写出得数．÷= += ÷= ×=1÷0.25= ÷1= ÷3= ﹣=
直接写出得数．÷= ×3= 6×= +×7=100÷10%= ÷1= ÷7=
= ÷21= 2.4×= 42÷= ×=10×10%= 3﹣1= 3π= 1﹣+= ×÷×=
÷8= 1÷0.01= ×6= ÷= 1÷=+= ﹣= ÷= += ×=
．
÷
= 
+
= 
÷
= 
×
=
÷1= 
÷3= 
﹣
=
÷
= 
×3= 6×
= 
+
×7=
÷1= 
÷7=
= 
÷21= 2.4×
= 42÷
= 
×
=
= 3π= 1﹣
+
= 
×
÷
×
=
÷8= 1÷0.01= 
×6= 
÷
= 1÷
=
+
= 
﹣
= 
÷
= 
+
= 
×
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