Question

help me to solve this​

Answer 1

$\huge\mathfrak\red{answer}$

It is given O is the centre of circle

Z CBD = 65°

To find the value of x

Z ABC + Z CBD = 180°

: Sum of linear pair of angles is always 180°

Z ABC + 65° 180°

» Z ABC = 180° + 65° =

115°

From the figure we can say that,

reflex Z AOC = 2 2 ABC

:The angle subtended by an arc of a circle at the centre is twice the angle subtended at any point

reflex 2 AOC = 2 × 115° = 230°

Thus the value of r = 230°

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Answer 2

Answer:

It is given O is the centre of circle

Z CBD = 65°

To find the value of x

Z ABC + Z CBD = 180°

: Sum of linear pair of angles is always 180°

Z ABC + 65° 180°

» Z ABC = 180° + 65° =

115°

From the figure we can say that,

reflex Z AOC = 2 2 ABC

:The angle subtended by an arc of a circle at the centre is twice the angle subtended at any point

reflex 2 AOC = 2 × 115° = 230°

Thus the value of r = 230°