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If O is the circumcentre of triangleABC,...

If O is the circumcentre of `triangleABC`, then the value of `(angleOBC + angleBAC)` is

A

`60^@`

B

`75^@`

C

`90^@`

D

`100^@`

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Knowledge Check

  • If the circumcentre of an equilateral triangle ABC is O, then the value of angleBOC is

    A
    `30^@`
    B
    `60^@`
    C
    `90^@`
    D
    `120^@`

  • O is the circumcentre of Delta ABC, given that angleBAC = 85^@ and angleBCA =55^@, then the value of angleOAC is

    A
    `40^@`
    B
    `45^@`
    C
    `50^@`
    D
    `55^@`

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