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(iii) Incentre of the triangle ABC is O,...

(iii) Incentre of the triangle ABC is O, If `angle BAC = 40^@`, then `angle BOC = `

A

`80^@`

B

`110^@`

C

`140^@`

D

`40^@`

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CALCUTTA BOOK HOUSE-THEOREMS ON CONCURRENCE-EXERCISE Long-answer type questions
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  3. Determine the nature of the roots of following quadratic equations : (...

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  4. Some students planned a picnic. The budget for food was Rs. 480. But e...

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  5. Find the value of k for which the given value is a solution of the giv...

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  6. A piece of cloth costs Rs. 35. If the piece were 4 m longer and each m...

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  7. Two medians BE and CF of Delta ABC intersect at G. Prove that area of ...

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  8. I is the incentre of Delta ABC, Produced AI bisects BC at D. Prove tha...

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  9. Find the values of k for which the roots are real and equal in the fol...

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  10. I is the incentre of the Delta ABC. The perpendicular drawn from I to ...

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  11. Find the values of k for which the roots are real and equal in the fol...

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  12. E is the mid-point of AD, a median of the Delta ABC. The extended BE i...

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  13. Write the first five terms of the following sequence whose nth term ar...

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  14. In Delta ABC, angle B le angle C. If the interior bisector of angle B...

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  15. P is a point on the median AD of the Delta ABC. Prove that area of De...

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  16. Find the next five terms of each of the following sequences given by :...

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  17. Write the first five terms of the following sequence whose nth term ar...

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  18. A bag contains 3 red balls, 5 black balls and 4 white balls. A ball is...

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