
BÀI 6. HỆ THỨC LƯỢNG TRONG TAM GIÁC
Quiz
•
Mathematics
•
10th Grade
•
Hard
Nhat Pham
Used 3+ times
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38 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho tam giác ABC, mệnh đề nào sau đây đúng?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho tam giác ABC, có độ dài ba cạnh là BC = a, AC = b, AB = c, gọi m_a là độ dài đường trung tuyến kẻ từ đỉnh A, R là bán kính đường tròn ngoại tiếp tam giác và S là diện tích tam giác đó. Mệnh đề nào sau đây sai?
S = abc/4R.
a/sin A = b/sin B = c/sin C = 2R.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho tam giác ABC có a = 8, b = 10, góc C bằng 60 độ. Độ dài cạnh c là?
c = 3√21.
c = √72.
c = 2√11.
c = 2√21.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Tam giác ABC có a = 8, c = 3, B = 60 độ. Độ dài cạnh b bằng bao nhiêu?
49.
√97.
7.
√61.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Tam giác ABC có B = 150 độ, BC = √3, AC = 2. Tính cạnh AB?
√13.
√3.
10.
1.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho a, b, c là độ dài 3 cạnh của tam giác ABC. Biết b = 7, c = 5, cos A = 4/5. Tính độ dài cạnh a.
3√2.
7√2/2.
23/8.
6.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho tam giác ABC có AB = 4 cm, BC = 7 cm, AC = 9 cm. Tính cos A.
cos A = -2/3.
cos A = 1/2.
cos A = 1/3.
cos A = 2/3.
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