Find the value of angle abc
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Step-by-step explanation:
Draw a angular bisector from A- C
then ,A=1/2(40)=20
C=1/2(56)=28
In∆AOC,
A+O+C=180°. [ ANGLE SUM PROPERTY]
20+28+O=180
O=180-48
O=132°
SUM OF ANGLES OF A CYCLIC QUADRILATETAL=360
A+B+C+O=360
40+56+132+B=360
B=360-228
THEREFORE,
B=132
tamilgadgets500:
Thanks. By the way you can make it shorter by taking angle b in triangle abc instead of angle o.
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