
九上內心3-2
Authored by 黃俊賓 關山國中
Mathematics
9th Grade
Used 3+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
內心是由什麼線所畫出來的
分角線
中垂線
中線
角平分線
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
內心的英文字母是用( )來代表
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
內心到哪裡等距離
三角形的頂點
三角形的三邊中點
三角形的三個邊
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
三角形的三內角平分線()
會交於同一點
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
三角形的內心會在三角形的( )
內部
外部
不一定,要看是直角、銳角還是鈍角。
三角形的邊上
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
已知△ABC為等腰三角形,兩斜邊各為10,底邊為12,則三角形的內切圓半徑是多少?
8
5
4
3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
計算內切圓半徑的方法有幾種?
1
2
3
4
Answer explanation
方法1:
三角形面積=(三角形的周長x內切圓半徑)/2
方法2:
直角三角形的內切圓半徑=(兩股之和一斜邊)/2
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