请你把下面图形的四个角的度数量出来．你发现了什么？
（1）图1：∠1= ∠2= ∠3= ∠4=
（2）图2：∠1= ∠2= ∠3= ∠4=
（3）图3：∠1+∠4= ∠2+∠3= ．
相关试题
．
﹣0.01= 2
+
= 27
÷9=（
﹣
）×12= 0.39÷2
= 2
+5.75=
1
÷1
= 7﹣7÷9=
×1.8= 0.6÷
= 2.1÷0.35= 1
÷1+0.15=
+
= 7÷1.4=
÷7=
÷2÷
= 0.25×25%= 4×
÷4×
﹣
=
+
=
﹣
= 12×
=
÷3=
=
×
= 0×
=
×
÷
=
=
=
=
=
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