Question

If O is the centre of the circle, find the value of x in each of the following figures :​

Answer 1

Answer:

of fig 16.123

EXPLANATION: Angle aoc + angle cob = 180°

180°-135°=45°

bc is the same arc at angle of and d so the angle Subtended by an arc at the center of the circle will be double the angle subtended by it at any point on the circle.

so,

angle bdc = ½ angle boc

angle bdc = ½×45

= 22.5°

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