in the given figure o is the centre and the measure of arc ABC is 100°.Determine angle ADC and ABC
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angle AOC=100 [Because arc ABC=100)
1/2 ANGLE AOC=ANGLE ADC
ANGLE ADC=50
Now ABCD is a cyclic quadrilateral.
So ANGLE ADC+ ANGLE ABC=180
ANGLE ABC=130
1/2 ANGLE AOC=ANGLE ADC
ANGLE ADC=50
Now ABCD is a cyclic quadrilateral.
So ANGLE ADC+ ANGLE ABC=180
ANGLE ABC=130
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