英语翻译Let A ,B and C be three points in a plane,such that AB/BC is equal to 3/5.Which of the following could be the ratio of AB/AC?choice 1=1/2 choice 2=1:3 choice 3=3:8A=choice 1B=choice 2C=choice 3D=choice 1 and 3E=choice 1,2 and 3
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英语翻译Let A ,B and C be three points in a plane,such that AB/BC is equal to 3/5.Which of the following could be the ratio of AB/AC?choice 1=1/2 choice 2=1:3 choice 3=3:8A=choice 1B=choice 2C=choice 3D=choice 1 and 3E=choice 1,2 and 3
英语翻译
Let A ,B and C be three points in a plane,such that AB/BC is equal to 3/5.Which of the following could be the ratio of AB/AC?
choice 1=1/2 choice 2=1:3 choice 3=3:8
A=choice 1
B=choice 2
C=choice 3
D=choice 1 and 3
E=choice 1,2 and 3
英语翻译Let A ,B and C be three points in a plane,such that AB/BC is equal to 3/5.Which of the following could be the ratio of AB/AC?choice 1=1/2 choice 2=1:3 choice 3=3:8A=choice 1B=choice 2C=choice 3D=choice 1 and 3E=choice 1,2 and 3
【翻译】
设A,B,C是一个平面上的三个点,使AB:BC=3:5.下列的哪个选项可能是AB/AC的比例?①=1:2 ②=1:3 ③=3:8
A.① B.② C.③ D.①③ E.①②③
【解题】
『分析:
单选题的多项选择蛤~
三角形三边的关系 a+b>c.
因为A、B、C三个点可以在同一直线上,
这道题的AB、BC和AC的关系一定是a+b≥c.』
if ① is right,AB:BC:AC=3:5:6 ,three straights make a triangle,so it is possible.
if ② is right,AB:BC:AC=3:5:9 ,three straights don't make a triangle or a straight,so it is impossible.
if ③ is right,AB:BC:AC=3:5:8 ,three straights make a straight,so it is possible.
So the right is ① and ③.
∴ The right answer is D.
让A、B和C是平面上的三个点,这样AB /BC等于3/5,则下列哪一种可能是AB/AC的比例?
A:1/2
B:1/3
C:3/8
D:A和C
E:A、B和C
可以通过画图得到答案为D
设A,B和C三点在一个平面上,使得AB比BC等于3比5。一下哪一个是AB比AC的比例?
选择D
(但楼主抄选项了吧? choice1=1 1/2 一又二分之一才对.)
解题思路
1. A_____B_________C 此种情况下AB/AC=3/8
2. C_____A_________B 此种情况下AB/AC=3/2
A、B、C是同一平面内的3个点,若AB/BC=3/5,则AB/AC的值可能是:
(1)1/2 (2)1/3 (3)3/8
A、只有(1)
B、只有(2)
C、只有(3)
D、(1)和(3)
E、(1)、(2)和(3)
至于解题..画画图吧相信你一定能解出来的=W=
一条直线上三点A,B,C,AB/BC=3/5,AB/AC可能是……
应该是3/2或3/8,选C