配套习题-利用方程思想解决角度之间关系问题 -【青果学院】

本课配套习题挑战模式1/5

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单选题

难度系数：

1.

如图所示，直线AB与CD相交于O点，∠1=∠2. 若∠AOE=140°，则∠AOC的度数为（　　）

A:
40°

B:
60°

C:
80°

D:
100°

提示1：PHA+5Y+v6K6+4oigMT14wrAsIOeUseKIoDE94oigMu+8jOW+l+KIoDI9IHjCsCDnlLHkuo7iiKBBT0Ur4oigQk9FPTE4MMKw77yM77yM5piT5rGC4oigMj00MMKw77yM6YKj5LmI4oigQk9EPTgwwrDvvIzliKnnlKjlr7npobbop5LmgKfotKjlj6/msYLiiKBBT0PjgII8L3A+
答案：Qw==
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

本课配套习题挑战模式2/5

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单选题

难度系数：

2.已知一个角的余角的补角是这个角补角的

，则这个角的余角度数是（　　）

A: 90°

B: 60°

C: 30°

D: 10°

提示1：IOWFiOW8hOa4hemimOebruS4reeahOaVsOmHj+WFs+ezu++8mui/meS4quinkueahOS9meinkueahOihpeinkuaYr+i/meS4quinkuihpeinkueahDxpbWcgd2lkdGg9NSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zQi80My9yQkFDRTFOclRHMmpnTUYtQUFBQk1DM1lQNjgzMDEucG5nIj4uIOWIl+WHuuaWueeoi++8jOaxguWHuui/meS4quinku+8jOi/m+S4gOatpeaxguWFtuS9meinkueahOW6puaVsA==
答案：Qg==
6Kej77ya6K6+6L+Z5Liq6KeS5Li6zrHvvIw8YnI+5YiZMTgwwrAt77yIOTDCsC3Ose+8iT08aW1nIHdpZHRoPTUgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0IvNDMvckJBQ0UxTnJURzJqZ01GLUFBQUJNQzNZUDY4MzAxLnBuZyI+77yIMTgwwrAtzrHvvInvvIw8YnI+4oi0zrE9MzDCsDxicj7ov5nkuKrop5LnmoTkvZnop5LkuLo5MMKwLTMwwrA9NjDCsC4gPGJyPuaVhemAiUIuIA==

本课配套习题挑战模式3/5

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单选题

难度系数：

3.已知一个角的补角是这个角的余角的2倍大20°，则这个角的度数为（）.

A: 30°

B: 20°

C: 25°

D: 35°

提示1：IOWIqeeUqOmimOS4reKAnOS4gOS4quinkueahOihpeinkuavlOi/meS4quinkueahOS9meinkueahDLlgI3lpKcyMMKw4oCd5L2c5Li655u4562J5YWz57O75YiX5pa556iL5rGC6Kej5Y2z5Y+vLg==
答案：Qg==
6Kej77ya6K6+6L+Z5Liq6KeS5piveO+8jDxicj7liJnvvIgxODDCsC1477yJLTLvvIg5MMKwLXjvvIk9MjDCsO+8jDxicj7op6Plvpd4PTIwwrAuIA==

本课配套习题挑战模式4/5

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单选题

难度系数：

4.如图1，扇子的圆心角为x°，余下扇形的圆心角为y°，x与y的比通常按黄金比例设计，这样的扇子外形较美观，若取黄金比为0.6，则x为（）度。

A: 216°

B: 135°

C: 120°

D: 108°

提示1：IOeUseWbvuWPr+efpXk9MzYwwrDvvI1477yM5qC55o2u6aKY5oSP55qEPGltZyB3aWR0aD0xMDggaGVpZ2h0PTI1IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRkYvMzkvckJBQ0ZGTnJUSVRpTGl5eUFBQUM2QlJHTy00MDYyLnBuZyI+
答案：Qg==
6Kej5p6Q77ya5qC55o2u6aKY5oSP5pyJ77yaPGltZyB3aWR0aD0xMDggaGVpZ2h0PTI1IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRkYvMzkvckJBQ0ZGTnJUSVRpTGl5eUFBQUM2QlJHTy00MDYyLnBuZyI+IDxicj4g6Kej5LmL5b6X77yaPGltZyB3aWR0aD01NCBoZWlnaHQ9MTcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zQi80My9yQkFDRTFOclRJVEQxcjZRQUFBQjBzeWs0T0U2ODcucG5nIj4gPGJyPiDmlYXpgIlC

本课配套习题挑战模式5/5

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单选题

难度系数：

5.

如图，直线AB、CD相交于点O，OE平分∠BOC，OF⊥OE于O，若∠AOD=70°，则∠AOF等于（　　）

A:
35°

B:
45°

C:
55°

D:
65°

提示1：PHA+55Sx5bey55+l5p2h5Lu25ZKM6KeC5a+f5Zu+5b2i77yM5Yip55So5a+56aG26KeS55u4562J44CB6KeS5bmz5YiG57q/55qE5oCn6LSo5ZKM5Z6C55u055qE5a6a5LmJ77yM5YaN57uT5ZCI5bmz6KeS5Li6MTgw5bqm77yM6K6+4oigQU9GPVjCsO+8jOW7uueri+aWueeoizwvcD4=
答案：Qw==
PHA+6Kej77ya4oi14oigQjBDPeKIoEFPRD03MMKw77yMPGJyPuWPiOKItU9F5bmz5YiG4oigQk9D77yMPGJyPuKItOKIoEJPRT08aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0IvNDMvckJBQ0UxTnJUSTZ5RTRaTkFBQUJHYWoyc05ROTA4LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zQi80My9yQkFDRTFOclRJNnlFNFpOQUFBQkdhajJzTlE5MDgucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iNSI+4oigQk9DPTM1wrAuPGJyPuKItU9G4oqlT0XvvIw8YnI+4oi04oigRU9GPTkwwrAuPGJyPuiuvuKIoEFPRj1YwrDkvp3mja7popjmhI/lj6/lvpczNSs5MCtYPTE4MO+8jOino+W+l1g9NTUuPGJyPuaVhemAiUMuPC9wPg==

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