挑战习题
1
/5
单选题
难度:
1.如果等腰三角形的的底角为50°,那么它的顶角为( )
A
50°
B
60°
C
70°
D
80°
提示1:
55Sx5bey55+l562J6IWw5LiJ6KeS5b2i55qE5LiA5Liq5bqV6KeS5pivNTDCsO+8jOWIqeeUqOetieiFsOS4ieinkuW9oueahOaAp+i0qOW+l+WPpuS4gOS4quW6leinkuS5n+aYrzUwwrA=
提示2:
57uT5ZCI5LiJ6KeS5b2i5YaF6KeS5ZKM5a6a55CG5Y+v5rGC6aG26KeS55qE5bqm5pWw77yO
正确答案:
RA==
6Kej77ya4oi15LiJ6KeS5b2i5piv562J6IWw5LiJ6KeS5b2i77yMPGJyPuKItOS4pOS4quW6leinkuebuOetie+8jDxicj7iiLXnrYnohbDkuInop5LlvaLnmoTkuIDkuKrlupXop5LmmK81MMKw77yMPGJyPuKItOWPpuS4gOS4quW6leinkuS5n+aYrzDCsO+8jDxicj7iiLTpobbop5LnmoTluqbmlbDkuLoxODDCsC01MMKwLTUwwrA9ODDCsO+8jjxicj7mlYXpgIlE77yO
2
/5
单选题
难度:
2.
一个等腰三角形的两边长分别是3和7,则三角形的周长是( )
A
17
B
15
C
13
D
13或17
提示1:
PHA+5Zug5Li66L655Li6M+WSjDfvvIzmsqHmmI7noa7mmK/lupXovrnov5jmmK/ohbDvvIzmiYDku6XmnInkuKTnp43mg4XlhrXvvIzpnIDopoHliIbnsbvorqjorro8L3A+
正确答案:
QQ==
PHA+6Kej77ya5YiG5Lik56eN5oOF5Ya177yaPGJyPuW9kzPkuLrlupXml7bvvIzlhbblroPkuKTovrnpg73kuLo377yMM+OAgTfjgIE35Y+v5Lul5p6E5oiQ5LiJ6KeS5b2i77yM5ZGo6ZW/5Li6MTfvvJs8YnI+5b2TM+S4uuiFsOaXtu+8jOWFtuWug+S4pOi+ueS4ujPlkow377yMMyszPTbvvJw377yM5omA5Lul5LiN6IO95p6E5oiQ5LiJ6KeS5b2i77yM5pWF6IiN5Y6777yMPGJyPuaJgOS7peetieiFsOS4ieinkuW9oueahOWRqOmVv+S4ujE377yOPGJyPuaVheWhqzE377yOPC9wPg==
3
/5
单选题
难度:
3.等腰三角形的一个外角等于100°,则与它不相邻的两个内角的度数分别为( )
A
40° 40°
B
80° 20°
C
50° 50°
D
50° 50°或80°20°
提示1:
5YWI5rGC5Ye65LiO6L+Z5Liq5aSW6KeS55u46YK755qE5YaF6KeS55qE5bqm5pWw
提示2:
5YaN5qC55o2u562J6IWw5LiJ6KeS5b2i5Lik5bqV6KeS55u4562J5YiG5oOF5Ya16K6o6K665rGC6Kej
正确答案:
RA==
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
4
/5
单选题
难度:
4.在等腰三角形ABC中,AB=AC,其周长为20cm,则AB的取值范围是( )
A
1cm<AB<4cm
B
5cm<AB<10cm
C
4cm<AB<8cm
D
4cm<AB<10cm
提示1:
6K6+QUI9QUM9eO+8jOWImUJDPTIwLTJ477yM5qC55o2u5LiJ6KeS5b2i55qE5LiJ6L655YWz57O75Y2z5Y+v5b6X5Ye657uT6K66
正确答案:
Qg==
6Kej77ya4oi15Zyo562J6IWw5LiJ6KeS5b2i5Lit77yMQUI9QUPvvIzlhbblkajplb/kuLoyMGNtPGJyPuKItEFCPUFDPXhjbe+8jOWImUJDPe+8iDIwLTJ477yJY208YnI+4oi0PGltZyB3aWR0aD04MyBoZWlnaHQ9NjIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9GQS8xMy9yQkFDRkZVX1BvT2hCd0xJQUFBQ3cxVzlraXM3NjgucG5nIj48YnI+6Kej5b6XNWNt77yceO+8nDEwY208YnI+4oi06YCJQg==
5
/5
单选题
难度:
5.已知△ABC的周长为13,且各边长均为整数,那么这样的等腰△ABC有( )
A
5个
B
4个
C
3个
D
2个
提示1:
5qC55o2u5LiJ6KeS5b2i5Lik6L655LmL5ZKM5aSn5LqO56ys5LiJ6L6577yM5Lik6L655LmL5beu5bCP5LqO56ys5LiJ6L65
提示2:
57uT5ZCI6L656ZW/5piv5pW05pWw6Kej562U
正确答案:
Qw==
6Kej77ya5ZGo6ZW/5Li6MTPvvIzovrnplb/lj6rog73mnInkuInnp43mg4XlhrUzLDUsNeWSjDQsNCw15oiWNiw2LDE=