中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.如图，该图形围绕其的旋转中心，按下列角度旋转后，能与自身重合的是（ ）
| A: 150° |
| B: 120° |
| C: 90° |
| D: 60° |
一次做对，真牛！
+5奖励规则>
- 提示1：6K+l5Zu+5b2i6KKr5bmz5YiG5oiQ5LiJ6YOo5YiG77yM5Zug6ICM5q+P6YOo5YiG6KKr5YiG5oiQ55qE5ZyG5b+D6KeS5pivMTIwwrDvvIzlubbkuJTlnIblhbfmnInml4vovazkuI3lj5jmgKfvvIzlm6DogIzml4vovawxMjDluqbnmoTmlbTmlbDlgI3vvIzlsLHlj6/ku6XkuI7oh6rouqvph43lkIjvvI4=
- 答案：Qg==
6Kej77ya6K+l5Zu+5b2i6KKr5bmz5YiG5oiQ5LiJ6YOo5YiG77yM5Zug6ICM5q+P6YOo5YiG6KKr5YiG5oiQ55qE5ZyG5b+D6KeS5pivMTIwwrDvvIzml4vovawxMjDCsOeahOaVtOaVsOWAje+8jOWwseWPr+S7peS4juiHqui6q+mHjeWQiO+8jDxicj7lm6DogIxB44CBQ+OAgUTpg73kuI3mraPnoa7vvIzkuI3og73kuI7lhbboh6rouqvph43lkIjvvJvog73kuI7oh6rouqvph43lkIjnmoTmmK9C77yOPGJyPuaVhemAiULvvI4=
本课配套习题挑战模式2/5
单选题
难度系数：
2.如图，将△ABC绕顶点C逆时针旋转得到△A′B′C′，且点B刚好落在A′B′上，若∠A=25°，∠BCA′=45°，则∠A′BA等于（ ）
| A: 30° |
| B: 35° |
| C: 40° |
| D: 45° |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u5peL6L2s55qE5oCn6LSo5Lul5Y+K5LiJ6KeS5b2i5aSW6KeS55qE5oCn6LSo5b6X5Ye64oigQkNB4oCyK+KIoEHigLI94oigQuKAskJDPTQ1wrArMjXCsD03MMKw77yM5Lul5Y+K4oigQkLigLJDPeKIoELigLJCQz03MMKw
- 提示2：5Yip55So5LiJ6KeS5b2i5YaF6KeS5ZKM5a6a55CG5b6X5Ye64oigQUNB4oCyPeKIoEHigLJCQT00MMKw77yO
- 答案：Qw==
6Kej77ya4oi14oigQT0yNcKw77yM4oigQkNB4oCyPTQ1wrDvvIw8YnI+4oi04oigQkNB4oCyK+KIoEHigLI94oigQuKAskJDPTQ1wrArMjXCsD03MMKw77yMPGJyPuKItUNCPUNC4oCy77yMPGJyPuKItOKIoEJC4oCyQz3iiKBC4oCyQkM9NzDCsO+8jDxicj7iiLTiiKBC4oCyQ0I9NDDCsO+8jDxicj7iiLTiiKBBQ0HigLI9NDDCsO+8jDxicj7iiLXiiKBBPeKIoEHigLLvvIziiKBB4oCyREI94oigQURD77yMPGJyPuKItOKIoEFDQeKAsj3iiKBB4oCyQkE9NDDCsO+8jjxicj7mlYXpgInvvJpD77yO
本课配套习题挑战模式3/5
单选题
难度系数：
3.如图，在Rt△ABC中，∠ACB=90°，∠A=30°，BC=2，将△ABC绕点C顺时针方向旋转60°后得到△EDC，此时点D在斜边AB上，斜边DE交AC于点F．则图中阴影部分的面积为（）
| A: 2 |
B: 2 |
C:  |
| D: |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u55u06KeS5LiJ6KeS5b2i5Lik6ZSQ6KeS5LqS5L2Z5rGC5Ye64oigQj02MMKw
- 提示2：5qC55o2u5peL6L2s5Y+Y5o2i5Y+q5pS55Y+Y5Zu+5b2i55qE5L2N572u5LiN5pS55Y+Y5Zu+5b2i55qE5b2i54q25LiO5aSn5bCP5Y+v5b6XQ0Q9QkPvvIzlho3msYLlh7riiKBBQ0Q9MzDCsO+8jOKIoENGRD05MMKw
- 提示3：6Kej55u06KeS5LiJ6KeS5b2i5rGC5Ye6REbjgIFDRg==
- 提示4：5Yip55So5LiJ6KeS5b2i55qE6Z2i56ev5YWs5byP5YiX5byP6K6h566X5Y2z5Y+v5b6X6Kej77yO
- 答案：Qw==
6Kej562U77ya4oi14oigQUNCPTkwwrDvvIziiKBBPTMwwrDvvIw8YnI+4oi04oigQj05MMKwLTMwwrA9NjDCsO+8jDxicj7iiLXilrNBQkPnu5XngrlD6aG65pe26ZKI5pa55ZCR5peL6L2sNjDCsOWQjuW+l+WIsOKWs0VEQ++8jOeCuUTlnKjmlpzovrlBQuS4iu+8jDxicj7iiLTiiKBCQ0Q9NjDCsO+8jENEPUJDPTLvvIw8YnI+4oi04oigQUNEPeKIoEFDQi3iiKBCQ0Q9OTDCsC02MMKwPTMwwrDvvIw8YnI+4oigQ0ZEPTE4MMKwLTMwwrAtNjDCsD05MMKw77yMPGJyPuWcqFJ04pazQ0RG5Lit77yMREY9PGltZyB3aWR0aD01IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzZFLzFCL3JCQUNKMVVfVjNialpGUXBBQUFCR0xUTFdiRTcyMC5wbmciPkNEPTxpbWcgd2lkdGg9NSBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC82RS8xQi9yQkFDSjFVX1YzYmpaRlFwQUFBQkdMVExXYkU3MjAucG5nIj7DlzI9Me+8jDxicj5DRj08aW1nIHdpZHRoPTk1IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0EzLzU1L3JCQUNFMVVfVjNhQnhHOFNBQUFDTmhaTTMxazQ3OC5wbmciPu+8jDxicj7iiLTpmLTlvbHpg6jliIbnmoTpnaLnp689PGltZyB3aWR0aD01IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzZFLzFCL3JCQUNKMVVfVjNialpGUXBBQUFCR0xUTFdiRTcyMC5wbmciPkRGJiM4MjI2O0NGPTxpbWcgd2lkdGg9NSBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC82RS8xQi9yQkFDSjFVX1YzYmpaRlFwQUFBQkdMVExXYkU3MjAucG5nIj7DlzHDlzxpbWcgd2lkdGg9MTUgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRkEvMUYvckJBQ0ZGVV9WM2JTZXFzS0FBQUJZQTc1ZDhJMDc4LnBuZyI+PTxpbWcgd2lkdGg9MTEgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNkQvRTYvckJBQ0psVV9WM2JDNjdiSEFBQUJUVXlOVlhvNTYyLnBuZyI+77yOPGJyPuaVhemAiUPvvI4=
本课配套习题挑战模式4/5
单选题
难度系数：
4.如图，△ABC为钝角三角形，将△ABC绕点A按逆时针方向旋转l20°得到△AB′C′，连接BB′，若AC′∥BB′，则∠CAB′的度数为（ ）
| A: 45° |
| B: 60° |
| C: 70° |
| D: 90° |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u5peL6L2s55qE5oCn6LSo5b6X5Yiw4oigQkFC4oCyPeKIoENBQ+KAsj0xMjDCsO+8jEFCPUFC4oCy
- 提示2：5qC55o2u562J6IWw5LiJ6KeS5b2i55qE5oCn6LSo5piT5b6X4oigQULigLJCPTMwwrA=
- 提示3：5qC55o2u5bmz6KGM57q/55qE5oCn6LSo55SxQUPigLLiiKVCQuKAsuW+l+KIoEPigLJBQuKAsj3iiKBBQuKAskI9MzDCsA==
- 提示4：5Yip55So4oigQ0FC4oCyPeKIoENBQ+KAsi3iiKBD4oCyQULigLLov5vooYzorqHnrpfvvI4=
- 答案：RA==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.如图，边长为1的正方形ABCD绕点A逆时针旋转45°后得到正方形AB1C1D1，边B1C1与CD交于点O，则四边形AB1OD的面积是（ ）
A:  |
B:  |
C:  |
D: 1+ |
一次做对，真牛！
+5奖励规则>
- 提示1：6L+e5o6lQUM8c3ViPjE8L3N1Yj7vvIxBT++8jOagueaNruWbm+i+ueW9okFCPHN1Yj4xPC9zdWI+QzxzdWI+MTwvc3ViPkQ8c3ViPjE8L3N1Yj7mmK/mraPmlrnlvaLvvIzlvpflh7riiKBDPHN1Yj4xPC9zdWI+QUI8c3ViPjE8L3N1Yj494oigQUM8c3ViPjE8L3N1Yj5CPHN1Yj4xPC9zdWI+PTQ1wrDvvIzmsYLlh7riiKBEQUI8c3ViPjE8L3N1Yj49NDXCsO+8jOaOqOWHukHjgIFE44CBQzxzdWI+MTwvc3ViPuS4ieeCueWFsee6vw==
- 提示2：5ZyoUnTilrNDPHN1Yj4xPC9zdWI+RDxzdWI+MTwvc3ViPkHkuK3vvIznlLHli77ogqHlrprnkIbmsYLlh7pBQzxzdWI+MTwvc3ViPu+8jOi/m+iAjOaxguWHukRDPHN1Yj4xPC9zdWI+PU9E77yM5qC55o2u5LiJ6KeS5b2i55qE6Z2i56ev6K6h566X5Y2z5Y+v77yO
- 答案：Qw==
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
