8年級尺規作圖(字)
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
曾偉倫 曾偉倫
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9 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
已知=5公分,欲找之中點,可以A、B為圓心,r公分為半徑畫弧。若r是正整數,則r的最小值為何?
5
4
3
2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在上分別以A、B兩點為圓心,長為半徑各畫一弧相交於C點,則△ABC為何種三角形?
直角三角形
等腰直角三角形
正三角形
鈍角三角形
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
已知君瑋在一線段上作了4次中垂線作圖,則下列哪一個選項的兩線段比,不可能是君瑋作圖得到的結果?
1:15
3:13
5:11
15:17
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
利用尺規作圖,可將任一角分成下列哪一種等分?
3
6
8
10
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
已知=20 cm,若想以中垂線作圖法將平分,分別以A、B為圓心畫弧,則半徑不可以是多少? ( 20分 )
(A) 9 cm (B) 11 cm (C) 12 cm (D) 13 cm
9
11
12
13
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將分成二部分,使其比為3:a,至少要作垂直平分線作圖4次,則a=?
11
13
15
19
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
. 利用角平分線作圖將∠ABC分成兩部分,使其比為1:7,則至少需作幾次?
2
3
4
5
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