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Answer True or False. ACB is an arc of a...

Answer True or False. ACB is an arc of a circle with centre O and `angle ABC = 45^(@)`, then, `AO bot OC`.

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True
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Chords AB andCD of a circle with centre O are congruent. If m(arc AXB) = 120^(@) then what is the m(arc( CYD).

In the following figure, O is the centre of the circle. AB is an arc of the circle, such that angle AOB=80^@ .Find angle ACB .

Knowledge Check

  • /_ACB is inscribed in arc ACB of a circle with centre O . If /_ACB= 65^(@) , find m ( arc ACB ) .

    A
    `65^(@)`
    B
    `130^(@)`
    C
    `295^(@)`
    D
    `230^(@)`

  • C is a point on the minor arc AB a circle with centre O. If angle AOB = 100^(@) , what is angle ACB ?

    A
    `80^(@)`
    B
    `90^(@)`
    C
    `100^(@)`
    D
    `130^(@)`

  • C is a point on the minor arc AB of the circle with centre O. Given angle ACB = x^(@) and angle AOB = y^(@) . Calculate x, if ACBO is a parallelogram.

    A
    `120^(@)`
    B
    `180^(@)`
    C
    `140^(@)`
    D
    `110^(@)`

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    In the figure 'G' is the centre of the circle. Find the angle ACB when angleAGB = 150^@

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