本课配套习题挑战模式1/5
单选题
难度系数:
1.如图,在△ABC中,∠ABC的平分线与∠ACB的外角平分线相交于D点,∠A=50°,则∠D=( )
A: 15° |
B: 20° |
C: 25° |
D: 30° |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruinhumikeS4reS+i+mimOeahOiusuino++8jOWPr+W/q+mAn+W+l+WHuuetlOahiA==
- 答案:Qw==
6Kej77ya5qC55o2u6KeG6aKR5Lit5L6L6aKY55qE6K6y6Kej77yM5Y+v5b+r6YCf5b6X5Ye6PGltZyB3aWR0aD0xMDIgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRUUvREIvckJBQ0ZGTmdiS2lqUEtNYUFBQUNVRlNLYXRzODcyLnBuZyI+PGJyPg==
本课配套习题挑战模式2/5
单选题
难度系数:
2.如图所示,在△ABC中,∠ABC和∠ACB的外角平分线交于点O,设∠BOC=α,则∠A等于( )
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWIqeeUqOS+i+mimOS4reiusuino+eahOaWueazle+8jOWPr+W/q+mAn+W+l+WHug==
- 答案:Qw==
6Kej77ya5qC55o2u5L6L6aKY55qE6K6y6Kej77yM6K++5b+r6YCf5b6X5Ye6PGltZyB3aWR0aD0zMjkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMkEvRTgvckJBQ0UxTmdiWEhCd2RGREFBQUVQSTNBZURVMjkxLnBuZyI+
本课配套习题挑战模式3/5
单选题
难度系数:
3.如图,△ABC的角平分线BO、CO相交于点O,∠A=120°,则∠BOC=( )
A: 150° |
B: 140° |
C: 130° |
D: 120° |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruinhumikeS4reS+i+mimOeahOiusuino++8jOW/q+mAn+ino+W+lw==
- 答案:QQ==
6Kej77ya5qC55o2u6KeG6aKR5Lit5L6L6aKY6K6y6Kej55qE5qih5Z6L77yM5Y+v5b+r6YCf5b6X5Ye6PGltZyB3aWR0aD0yMjMgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMkEvRTkvckJBQ0UxTmdiWC1nejN3QUFBQURhREctNU5jOTI2LnBuZyI+
本课配套习题挑战模式4/5
单选题
难度系数:
4.如图,△ABC的角平分线BO、CO相交于点O,∠O=140°,则∠A=( )
A: 160° |
B: 140° |
C: 120° |
D: 100° |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruinhumikeS4reS+i+mimOeahOiusuino++8jOW/q+mAn+ino+W+lw==
- 答案:RA==
6Kej77ya5qC55o2u6KeG6aKR5Lit5L6L6aKY6K6y6Kej55qE5qih5Z6L77yMPGJyPuWPr+W/q+mAn+W+l+WHujxpbWcgd2lkdGg9Mjk2IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0VFL0U0L3JCQUNGRk5nYm1pZ0lJWFFBQUFFSjdrVnplMDk4MS5wbmciPg==
本课配套习题挑战模式5/5
单选题
难度系数:
5.如图,分别是△ABC的内角平分线和外角平分线,的角平分线的角平分线,的角平分线,的角平分线,若
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:IOeUseS+i+mimOS4reeahOaooeWei+iusuino++8jOWPr+efpTxpbWcgd2lkdGg9NjggaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRUUvREYvckJBQ0ZGTmdiWV95QWR2ZkFBQUNGUUYwMmU4Mjg5LnBuZyI+77yM5Y+v5Lul5Y+R546w5ZCO5LiA5Liq6KeS562J5LqO5YmN5LiA5Liq6KeS55qEPGltZyB3aWR0aD02IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzJBL0U5L3JCQUNFMU5nYllfU05TVE1BQUFCSEdqTWpGMDkzMC5wbmciPg==
- 答案:Qg==
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