| 1 |
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| 2 |
The in-radius r of a triangle is given by: |
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| 3 |
In triangle the length of the sides are 7, 4√3 and √13. Then the smallest angle is: |
- A. 15°
- B. 30°
- C. 60°
- D. 45°
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| 4 |
A circle which touches one side of a triangle externally and the other two produces sides internally is known as: |
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| 5 |
If α, ß, Γ are the angles of a oblique triangle, then: |
- A. α = 90°
- B. ß = 90°
- C. Γ = 90°
- D. none of these
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| 6 |
In a triangle ABC b = √3, c = 1, α = 30° then a = : |
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| 7 |
If 2s = a + b +c, then in any triangle ABC: |
- A.
- B.
- C.
- D. none of these
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| 8 |
r<sub>1 </sub>= |
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| 9 |
The lengths of the sides of a triangle are proportional to the sines of the opposite angles to the sides. This is known as: |
- A. The law of sines
- B. The law of cosines
- C. The law of tangents
- D. The fundamental law
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| 10 |
The circum-radius R of a triangle is given by: |
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