本课配套习题挑战模式1/5
A: 67.5° |
B: 60° |
C: 45° |
D: 30° |
- 提示1:IOWFiOiuvui/meS4quinkuS4ung=
- 提示2:IOWImeagueaNrui/meS4quinkueahOihpeinkuaYr+Wug+eahOS9meinkueahDTlgI3liJflh7rmlrnnqIvvvIzmsYLlh7p455qE5YC85Y2z5Y+v
- 答案:Qg==
PGRpdj7op6PvvJrorr7ov5nkuKrop5LkuLp477yM5YiZ5YW26KGl6KeS5pivMTgwwrAteO+8jOWFtuS9meinkuaYrzkwwrAteO+8jDxicj7liJkxODDCsC14PTTvvIg5MMKwLXjvvInvvIw8YnI+6Kej5b6XeD02MMKwLiA8YnI+5pWF6YCJQi4gPC9kaXY+
本课配套习题挑战模式2/5
如果两个角的度数的比为7:3,它们的差为72°,则这两个角的度数是( )
A: 125°,55° |
B: 120°,48° |
C: 126°,54° |
D: 以上都不对 |
- 提示1:PHA+5Y+v5qC55o2u5bey55+l5Lit55qE5Lik5Liq6KeS55qE5bqm5pWw55qE5q+U5Li6N++8mjPvvIzorr7kuKTkuKrop5LnmoTluqbmlbDliIbliKvkuLo3eMKw77yMM3jCsDwvcD4=
- 提示2:PHA+5YaN5qC55o2u5beu5Li6NzLCsOi/meS4quetiemHj+WFs+ezu+W7uueri+aWueeoizwvcD4=
- 提示3:PHA+5rGC6Kej5Y2z5b6X5Lik5Liq6KeS55qE5bqm5pWwPC9wPg==
- 答案:Qw==
PGRpdj7op6PvvJrorr7ov5nkuKTkuKrop5LnmoTluqbmlbDliIbliKvkuLo3eOOCnO+8jDN444KcLjxicj7iiLXkuKTkuKrop5LnmoTlt67kuLo3MsKw77yMPGJyPuKItDd4LTN4PTcy77yM6Kej5b6XeD0xOC48YnI+4oi0N3g9MTI277yMM3g9NTTvvIzljbPov5nkuKTkuKrop5LnmoTluqbmlbDliIbliKvkuLoxMjbjgpzvvIw1NOOCnC48L2Rpdj4=
本课配套习题挑战模式3/5
如图,AB为直线,OC是∠AOD的平分线,OE在∠BOD内,∠DOE=∠BOD,∠COE=72°,则∠EOB的度数为( )
A: 70° |
B: 71° |
C: 72° |
D: 75° |
- 提示1:PHA+5Y+v5qC55o2u5bey55+l5Lit55qE4oigRE9FPTxpbWcgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yNC9DOC9yQkFDRTFNTldDU1N3Y0Q5QUFBQkp6X0FKdUU3MjgucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzI0L0M4L3JCQUNFMU1OV0NTU3djRDlBQUFCSnpfQUp1RTcyOC5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSI4Ij7iiKBCT0TvvIzov5nkuKrmlbDph4/lhbPns7vorr7mnKrnn6XmlbA8L3A+
- 提示2:PHA+6K6+4oigRE9FPXjvvIziiKBCT0Q9M3g8L3A+
- 提示3:PHA+5YaN5qC55o2u5bey55+l5p2h5Lu277yM5om+562J6YeP5YWz57O777yM5YiX5Ye65pa556iL5rGC6Kej5Y2z5Y+vPC9wPg==
- 答案:Qw==
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
本课配套习题挑战模式4/5
如图,BD平分∠ABC,BE分∠ABC分2:5两部分,∠DBE=21°,则∠ABC的度数为( ).
A: 90° |
B: 95° |
C: 98° |
D: 100° |
- 提示1:PHA+5qC55o2uQkXliIbiiKBBQkPliIYy77yaNeS4pOmDqOWIhui/meS4gOWFs+ezu+iuvuWHuuacquefpeaVsDwvcD4=
- 提示2:PHA+5Y+v6K6+4oigQUJFPTJ4wrDvvIziiKBFQkM9NXjCsDwvcD4=
- 提示3:PHA+5YaN5qC55o2uQkTlubPliIbiiKBBQkPvvIzljbPiiKBDQkQ94oigREJB6L+Z5LiA562J6YeP5YWz57O75YiX5Ye65pa556iL5rGC6KejPC9wPg==
- 答案:Qw==
PGRpdj7op6PvvJrorr7iiKBBQkU9MnjCsO+8jDxicj7lvpcyeCsyMT01eC0yMe+8jDxicj7op6Plvpd4PTE077yMPGJyPuKItOKIoEFCQz0xNMKww5c3PTk4wrAuPGJyPuKItOKIoEFCQ+eahOW6puaVsOaYrzk4wrAuPGJyPuaVheetlOahiOS4ujk4wrAuPC9kaXY+
本课配套习题挑战模式5/5
如图,将一副三角尺的直角顶点重合在一起. 若∠DOB与∠DOA的比是2:11,则∠BOC的度数为( ).
A: 60° |
B: 65° |
C: 70° |
D: 75° |
- 提示1:PHA+5qC55o2u4oigRE9C5LiO4oigRE9B55qE5q+U5pivMu+8mjEx5p2l6K6+5pyq55+l5pWwPC9wPg==
- 提示2:PHA+6K6+4oigRE9CPTJ4wrDvvIzliJniiKBET0E9MTF4wrA8L3A+
- 提示3:PHA+5YaN6KeC5a+f55yL4oigRE9B6Zmk5LqG55SoMTF45p2l6KGo56S65aSW77yM6IO95ZCm55So5YW25LuW55qE5b2i5byP5p2l6KGo56S677yb5LmL5ZCO5bu656uL562J6YeP5YWz57O75YiX5pa556iL5Y2z5Y+vPC9wPg==
- 答案:Qw==
PGRpdj7op6PvvJrorr7iiKBET0I9MnjCsO+8jOWImeKIoERPQT0xMXjCsO+8jDxicj7iiLXiiKBBT0I94oigQ09EPGJyPuKItOKIoEFPQz3iiKBET0I9MnjCsO+8jOKIoEJPQz03eMKwLjxicj7lj4jiiLXiiKBBT0Q94oigQU9CK+KIoENPRC3iiKBCT0M9MTgwwrAt4oigQk9DPGJyPuWImeW+l+aWueeoi++8mjExeD0xODAtN3g8YnI+6Kej5b6X77yaeD0xMDxicj7iiLTiiKBCT0M9NzDCsC48L2Rpdj4=