1 |
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- A. 3:5:2
- B.
- C. 3:2:1
- D. 1:2:3
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2 |
r<sub>1 </sub>= |
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3 |
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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4 |
A circle passing though the vertices of a triangle is known as: |
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5 |
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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6 |
If 2s = a + b + c, where a, b, c are the sides of a triangle ABC, then area of triangle ABC is given by: |
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7 |
r r<sub>1</sub> r<sub>2</sub> r<sub>3</sub> = |
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8 |
With usual notations for triangle R equals: |
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9 |
In any triangle ABC, law of cosines is: |
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10 |
r<sub>3</sub> = |
|