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is the centre of the circle in Fig. 11.28. Findthe measures of LACB, LABC and 4BAC.60Fig. 1128 |
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Answer» angle ACB=90°as it is angle subtended by diameter it is 90°hence angle OCB=90-60=30°nowangle ABC=angle CAB..as equal angle is subtended on both endshence as its a right angled triangle sum of these angles will be 90 and as they are equal it will be 45° each. |
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