1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   Equilateral
2. B
   Isosceles
3. C
   Right angled triangle
4. D
   Scalene but not right angled

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1. A
   $4\sqrt{3}$
2. B
   $6\sqrt{3}$
3. C
   $8\sqrt{3}$
4. D
   $12\sqrt{3}$

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1. A
   4
2. B
   6
3. C
   8
4. D
   10

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1. A
   3a
2. B
   2b
3. C
   3b
4. D
   2c

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1. A
   $2:(2+\sqrt{3}):3$
2. B
   $2:(2-\sqrt{3}):2$
3. C
   $2:(2+\sqrt{3}):2$
4. D
   $2:(2-\sqrt{3}):3$

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1. A
   I only
2. B
   II only
3. C
   Both I and II
4. D
   Neither I nor II

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1. A
   $60°$
2. B
   $105°$
3. C
   $120°$
4. D
   $150°$

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1. A
   $\frac{15\sqrt{3}}{4}$ square cm
2. B
   $\frac{15\sqrt{3}}{2}$ square cm
3. C
   $15\sqrt{3}$ square cm
4. D
   $30\sqrt{3}$ square cm

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1. A
   $\frac{\sqrt{3}-\sqrt{3}}{2}a$
2. B
   $\frac{\sqrt{3}+\sqrt{3}}{2}a$
3. C
   $\frac{\sqrt{3}-\sqrt{3}}{4}a$
4. D
   $\frac{\sqrt{3}+3}{4}a$

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1. A
   $\frac{\sqrt{3}+\sqrt{3}}{2}b$
2. B
   $\frac{\sqrt{3}-\sqrt{3}}{2}b$
3. C
   $\frac{\sqrt{3}-\sqrt{3}}{4}b$
4. D
   $\frac{\sqrt{3}+3}{4}b$

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1. A
   $15°$
2. B
   $30°$
3. C
   $45°$
4. D
   $75°$

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1. A
   I only
2. B
   II and III only
3. C
   I and III only
4. D
   I, II and III

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