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.
将一矩形纸条按如图所示折叠，则∠1的度数为（ ）
| A: 72° |
| B: 84° |
| C: 63° |
| D: 76° |
一次做对，真牛！
+5奖励规则>
- 提示1：<p>根据折叠前后图形全等，先求出∠2的度数<img src="data:image/png;base64,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" data-cke-saved-src="data:image/png;base64,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" alt=""></p>
- 提示2：PHA+5YaN5Yip55So5bmz6KeS5a6a5LmJ5rGC5Ye64oigM++8jOagueaNruS4pOebtOe6v+W5s+ihjO+8jOWQjOS9jeinkuebuOetieWNs+WPr+axguWHuuKIoDHnmoTluqbmlbA8L3A+
- 答案：QQ==
<div>解：根据题意∠2=54°，<br>∴∠3=180°-∠2-54°=72°，<br>∴∠1=∠3=72°.<br>故选A.<br></div><div><img src="data:image/png;base64,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" data-cke-saved-src="data:image/png;base64,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" alt=""><br></div>
本课配套习题挑战模式2/5
单选题
难度系数：
2.
将如图①的矩形ABCD纸片沿EF折叠得到图②，折叠后DE与BF相交于点P，如果∠BPE=130°，则∠PEF的度数为（ ）
| A: 60° |
| B: 65° |
| C: 70° |
| D: 75° |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+57+75oqY5YmN5ZCO55qE5Lik5Liq5Zu+5b2i5piv5YWo562J55qE77yM5a+55bqU6L6544CB5a+55bqU6KeS6YO955u4562JPC9wPg==
- 提示2：PHA+5Lik55u057q/5bmz6KGM77yM5ZCM5peB5YaF6KeS5LqS6KGlPC9wPg==
- 答案：Qg==
PGRpdj7op6PvvJriiLVBReKIpUJG77yMPGJyPuKItOKIoEFFUD0xODDluqYt4oigQlBFPTE4MOW6pi0xMzDluqY9NTDluqY8YnI+5Y+I4oi15oqY5Y+g5ZCOREXkuI5CRuebuOS6pOS6jueCuVDvvIw8YnI+5qC55o2u5oqY5Y+g6KeE5b6L77yM4oigUEVGPeKIoERFRjxicj48L2Rpdj48ZGl2PuWPiOWboOS4uuKIoEFFUCviiKBQRUYr4oigREVGPTE4MOW6pjxicj48L2Rpdj48ZGl2PuaJgOS7pTLiiKBQRUY9MTMw5bqmPGJyPjwvZGl2PjxkaXY+4oigUEVGPTY15bqmPGJyPuaVhemAiUIuPGJyPjwvZGl2Pg==
本课配套习题挑战模式3/5
单选题
难度系数：
3.
将一矩形纸片按如图方式折叠，BC、BD为折痕，折叠后A′B与E′B在同一条直线上，则∠CBD的度数（ ）
| A: 大于90° |
| B: 小于90° |
| C: 等于90° |
| D: 不能确定 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+55Sx5oqY5Y+g55qE5oCn6LSo5Y+v55+l4oigQUJDPeKIoEHigLJCQ++8jOKIoERCRT3iiKBEQkXigLI8L3A+
- 提示2：PHA+4oigQUJDK+KIoEHigLJCQyviiKBEQkUr4oigREJF4oCyPTE4MMKwPC9wPg==
- 提示3：PHA+4oigQeKAskJDK+KIoERCReKAsj05MMKwPC9wPg==
- 答案：Qw==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.
如图，把矩形ABCD沿直线EF折叠，若∠1=20°，则∠2=（ ）
| A: 80° |
| B: 70° |
| C: 40° |
| D: 20° |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5aaC5Zu+6L+HR+eCueS9nEdI4oilQUQ8aW1nIGhlaWdodD0iOTMiIHdpZHRoPSIxNTgiIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvNzAvckJBQ0ZGTU1XekxRQzNWQ0FBQVRPbktnM080Mzc1LnBuZyIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wMC83MC9yQkFDRkZNTVd6TFFDM1ZDQUFBVE9uS2czTzQzNzUucG5nIj48L3A+
- 提示2：PHA+5qC55o2u5oqY5Y+g55qE5oCn6LSo4oigMyviiKA0PeKIoEI9OTDCsDwvcD4=
- 提示3：PHA+QUTiiKVCQ++8jOWImUhH4oilQkPvvIzmoLnmja7lubPooYznur/mgKfotKjlvpfiiKAxPeKIoDM9MjDCsO+8jOaJgOS7peKIoDI94oigND05MMKwLTIwwrA9NzDCsDwvcD4=
- 答案：Qg==
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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1是矩形纸带，∠DEF=18°，将纸带沿EF折叠成图2，再沿BF折叠成图3，则图3中的∠CFE的度数是（ ）
| A: 126° |
| B: 124° |
| C: 120° |
| D: 118° |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+55Sx6aKY5oSP55+l4oigREVGPeKIoEVGQj0xOMKwPC9wPg==
- 提示2：PHA+5Zu+MuKIoEdGQz0xNDTCsDwvcD4=
- 提示3：PHA+5Zu+M+S4reeahOKIoENGRT3iiKBHRkMt4oigRUZHPTEyNsKwPC9wPg==
- 答案：QQ==
PGRpdj7op6PvvJriiLVBROKIpUJD77yMPGJyPuKItOKIoERFRj3iiKBFRkI9MTjCsO+8jDxicj7lnKjlm74y5Lit77ya4oigR0ZDPTE4MMKwLTLiiKBFRkc9MTgwwrAtMzbCsD0xNDTCsO+8jDxicj7lnKjlm74z5Lit77ya4oigQ0ZFPeKIoEdGQy3iiKBFRkc9MTQ0wrAtMTjCsD0xMjbCsO+8jDxicj7mlYXpgIlBLjwvZGl2Pg==
