配套习题- 认识三角形的高线 -【青果学院】

挑战习题

1/5单选题

难度：

1.下列说法正确的是（）

A	三角形三条高都在三角形内
B	三角形三条中线相交于一点
C	三角形的三条角平分线可能在三角形内，也可能在三角形外
D	三角形的角平分线是射线

提示1：: IOazqOaEj+mSneinkuS4ieinkuW9oueahOmrmOe6v+eahOS9nOazlQ==

提示2：: IOS4ieinkuW9oueahOS4iee6v+mDveaYr+e6v+autQ==

正确答案：Qg==

6Kej77ya77yIQe+8iemSneinkuS4ieinkuW9oueahOS4gOadoemrmO+8mjxicj48aW1nIHdpZHRoPTEyMyBoZWlnaHQ9NDMgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9FRS9EOS9yQkFDRTFOUE0yU2pIUTl1QUFBSEw1UXd6SHcxMTAucG5nIiBhbHQ96Z2S5p6c5a2m6ZmiPjxicj7vvIhD77yJ5LiJ6KeS5b2i55qE5LiJ5p2h6KeS5bmz5YiG57q/6YO95Zyo5LiJ6KeS5b2i5YaF6YOo77yM5omA5Lul5Lqk54K55Zyo5LiJ6KeS5b2i5YaF6YOo44CCPGJyPu+8iETvvInkuInop5LlvaLnmoTkuK3nur/vvIzpq5jnur/vvIzop5LlubPliIbnur/pg73mmK/nur/mrrXvvIw8YnI+5omA5Lul6YCJQg==

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2/5单选题

难度：

2.如图所示的△ABC中，线段BE是三角形AC边上的高的是（）

A
B
C
D

提示1：: IOagueaNruS4ieinkuW9oumrmOeahOWumuS5ie+8jOi/h+mhtueCueS9nOWvuei+ueaJgOWcqOeahOebtOe6v+eahOWegue6v++8jOmhtueCueS4juWegui2s+S5i+mXtOeahOe6v+auteWPq+WBmui/meS4quS4ieinkuW9oueahOmrmA==

提示2：: IOazqOaEj++8muaYr+Wvuei+ueaJgOWcqOeahOebtOe6v++8jOS5n+WwseaYr+WPr+S7peW7tumVv+eahA==

提示3：: IOS4gOWumuimgeeUqOS4ieinkuadv++8jOi/h+S/neivgeaJgOS9nOeahOmrmOS4jui+ueaJgOWcqOeahOebtOe6v+WkueinkuS4ujkwwrA=

正确答案：Qg==

6Kej77ya5bu26ZW/Q0HvvIw8YnI+6L+HQueCueWQkUNB55qE5bu26ZW/57q/5L2c5Z6C57q/77yMPGJyPkEuICDmiYDlgZrnmoTiiKBCRUPkuI3nrYnkuo45MMKwPGJyPkMu5omA5YGa55qEQUXlupTor6XmmK/lnoLnm7RCQ+eahOS4jeiDveWeguebtEFDPGJyPkQuIOaJgOWBmueahOKIoEFFQuS4jeetieS6jjkwwrA8YnI+5omA5Lul6YCJQg==

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3/5单选题

难度：

3.如图，△ABC中∠C=90°，CD⊥AB，图中线段中可以作为△ABC的高的有（）青果学院

A	1条
B	2条
C	3条
D	4条

提示1：: IOazqOaEj++8muebtOinkuS4ieinkuW9oueahOmrmOe6v++8jOaWnOi+ueacieS4gOadoemrmA==

提示2：: IOS4pOadoeebtOinkui+ueWIhuWIq+aYr+S4pOadoemrmA==

正确答案：Qw==

6Kej77ya5Y+v5Lul5L2c5Li64pazQUJD55qE6auY55qE5pyJQUPvvIxCQ++8jENE5YWxM+adoS4g6L+Z6YeM6KaB5rOo5oSP55u06KeS5LiJ6KeS5b2i55qE5Lik5p2h55u06KeS6L655Lmf5YiG5Yir5piv5Lik5p2h6auY44CCPGJyPuaVhemAiUMuIA==

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4/5单选题

难度：

如图在△ABC中，∠ACB＞90°，AD⊥BD，BE⊥AE，CF⊥AB，垂足分别是点D、E、F，则下列说法错误的是（）

青果学院

A	AD是△ABD的高
B	CF是△ABC的高
C	BE是△ABC的高
D	BC是△BCF的高

提示1：: PHA+5qC55o2u5LiJ6KeS5b2i55qE5LiA5Liq6aG254K55Yiw5a+56L6555qE5Z6C57q/5q615Y+r5YGa5LiJ6KeS5b2i55qE6auY5a+55ZCE6YCJ6aG55YiG5p6Q5Yik5pat5ZCO5Yip55So5o6S6Zmk5rOV5rGC6KejPC9wPg==

正确答案：RA==

PHA+6Kej77yaQeOAgUFE5piv4pazQUJE55qE6auY5q2j56Gu77yM5pWF5pys6YCJ6aG56ZSZ6K+v77ybPGJyPkLjgIFDRuaYr+KWs0FCQ+eahOmrmOato+ehru+8jOaVheacrOmAiemhuemUmeivr++8mzxicj5D44CBQkXmmK/ilrNBQkPnmoTpq5jmraPnoa7vvIzmlYXmnKzpgInpobnplJnor6/vvJs8YnI+ROOAgUJD5piv4pazQkNG55qE6auY6ZSZ6K+v77yM5pWF5pys6YCJ6aG55q2j56GuLjxicj7mlYXpgIlELjwvcD4=

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5/5单选题

难度：

5.如图△ABC中，∠A=20°，CD是∠BCA的平分线，△CDA中，DE是CA边上的高，又有∠EDA=∠CDB，求∠B的度数（）.

A	30°
B	45°
C	60°
D	75°

提示1：: CiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg5qC55o2u55u06KeS5LiJ6KeS5b2i5Lik6ZSQ6KeS5LqS5L2Z5rGC5Ye64oigRURB55qE5bqm5pWw77yMCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA=

提示2：: CiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg5YaN5qC55o2u5bmz6KeS55qE5a6a5LmJ5rGC5Ye64oigQ0RF55qE5bqm5pWw77yMCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA=

提示3：: CiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg5YaN5qyh5Yip55So55u06KeS5LiJ6KeS5b2i5Lik6ZSQ6KeS5LqS5L2Z5rGC5Ye64oigRENF55qE5bqm5pWw77yM5LuO6ICM5b6X5Yiw4oigQkNB55qE5bqm5pWw77yMCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA=

正确答案：Qw==

6Kej77ya4oi1REXmmK9DQei+ueS4iueahOmrmO+8jDxicj7iiLTiiKBERUE94oigREVDPTkwwrDvvIw8YnI+4oi14oigQT0yMMKw77yMPGJyPuKItOKIoEVEQT05MMKwLTIwwrA9NzDCsO+8jDxicj7iiLXiiKBFREE94oigQ0RC77yMPGJyPuKItOKIoENERT0xODDCsC03MMKww5cyPTQwwrDvvIw8YnI+5ZyoUnTilrNDREXkuK3vvIziiKBEQ0U9OTDCsC00MMKwPTUwwrDvvIw8YnI+4oi1Q0TmmK/iiKBCQ0HnmoTlubPliIbnur/vvIw8YnI+4oi04oigQkNBPTLiiKBEQ0U9MsOXNTDCsD0xMDDCsO+8jDxicj7lnKjilrNBQkPkuK3vvIziiKBCPTE4MMKwLeKIoEJDQS3iiKBBPTE4MMKwLTEwMMKwLTIwwrA9NjDCsC4gPGJyPuaVheetlOahiOS4uu+8mjYwwrAuIA==

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