本课配套习题挑战模式2/5
单选题
难度系数:
2.具备下列条件的三角形中,不是直角三角形的是()
A: ∠A+∠B=∠C |
B: ∠B=∠C=∠A |
C: ∠A=90°-∠B |
D: ∠A-∠B=90° |
一次做对,真牛!
+5奖励规则>
- 提示1:5ZCE6YCJ6aG56YCQ5LiA5Yik5pat
- 提示2:4oigQSviiKBCK+KIoEM9MTgw
- 答案:RA==
6Kej562U77ya5ZCE6YCJ6aG56YCQ5LiA5Yik5pat77yMQS7iiKBBK+KIoEIr4oigQz0xODDCsO+8jOKIoDxpPkE8L2k+K+KIoDxpPkI8L2k+PeKIoEPlj6/lvpfiiKBDPTkwwrDvvIzmmK/nm7Top5LkuInop5LlvaLvvJtCLuiuvuKIoEI94oigQz1477yM5YiZ4oigQT0yeO+8jOWPr+W+lzR4PTE4MMKw77yM4oigQT05MMKw5piv55u06KeS5LiJ6KeS5b2i77ybQy7iiKBBK+KIoEI9OTDCsO+8jOWImeKIoEM9OTDCsO+8jOaYr+ebtOinkuS4ieinkuW9ou+8m0Qu4oi14oigPGk+QTwvaT4t4oigPGk+QjwvaT49OTDCsO+8jOKItOKIoEHvvJ45MMKwLOWImeKIoELvvJw5MMKw77yM4oigQ++8nDkwwrDvvIzkuI3mmK/nm7Top5LkuInop5LlvaI8YnI+5pWF6YCJRA==
本课配套习题挑战模式3/5
单选题
难度系数:
3.如图,∠A=50°,BD,CD分别是∠B,∠C的平分线,则∠BDC等于()
A: 65° |
B: 100° |
C: 115° |
D: 130° |
一次做对,真牛!
+5奖励规则>
- 提示1:5YWI5qC55o2u6KeS5bmz5YiG57q/55qE5oCn6LSo5rGC5Ye64oigREJD44CB4oigRENC5LiO4oigQeeahOWFs+ezuw==
- 提示2:5YaN5qC55o2u5LiJ6KeS5b2i5YaF6KeS5ZKM5a6a55CG5rGC6Kej5Y2z5Y+v
- 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,在中,,为上一点,则可能是( )
A: 10° |
B: 20° |
C: 30° |
D: 40° |
一次做对,真牛!
+5奖励规则>
- 提示1:4oigRD05MMKw4oi04oigQkNE5piv5Liq6ZSQ6KeS
- 提示2:4oigQUNE5piv5Liq6ZKd6KeS
- 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,ABCDE是封闭折线,则∠A+∠B+∠C+∠D+∠E为度( )
A: 90° |
B: 180° |
C: 360° |
D: 270° |
一次做对,真牛!
+5奖励规则>
- 提示1:PHA+6L+e5o6lQUM8L3A+
- 提示2:PHA+5oqK6KaB5rGC55qE6KeS6YO96L2s5o2i5Yiw4pazQUJD5LitPC9wPg==
- 提示3:PHA+5qC55o2u5LiJ6KeS5b2i55qE5YaF6KeS5ZKM5a6a55CG6L+b6KGM6K6h566XPC9wPg==
- 答案:Qg==
PHA+6Kej562U77ya6L+e5o6lQUPvvI48YnI+5qC55o2u5LiJ6KeS5b2i55qE5YaF6KeS5ZKM5a6a55CG77yM5b6XPGJyPuKIoEQr4oigRT3iiKBDQUUr4oigQUNE77yOPGJyPuKItOKIoEEr4oigQiviiKBDK+KIoEQr4oigRT3iiKBCK+KIoEJBQyviiKBBQ0I9MTgwwrDvvI48L3A+