4-3 Preview
Quiz
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Mathematics
•
10th Grade
•
Medium
黃筱崴 黃筱崴
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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
設 a,b 和 c 分別表△ABC 三內角∠A,∠B,∠C 之對邊長,則△ABC 的面積為何?
以上皆是
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
設 a,b 和 c 分別表△ABC 三內角∠A,∠B,∠C 之對邊長,而R 表其外接圓半徑,則正弦定理為何?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
設 a,b 和 c 分別表△ABC 三內角∠A,∠B,∠C 之對邊長,則餘弦定理為何?
以上皆正確
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
∠A 為銳角 (cos A>0) 等價於下列何者?
a2<b2+c2
a2=b2+c2
a2>b2+c2
以上皆可
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
(海龍公式)設△ABC三邊長為a,b,c,且
(半周長),則△ABC 的面積為何?
以上皆可
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
若直線與 x 軸的正方向夾角為θ,(-90°<θ≤ 90°),稱為此直線的斜角。若直線的斜率為 m,則 m=
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