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3 years ago

8

How to solve the problem

1 answer:

WINSTONCH [101]3 years ago

7 0

As tgose lines are parallel then,

a = 140° ( by alternate interior angles)

then,
tha angle just below "a" on the other paralle line would also be 140° by corresponding angles,

using exterior angle property of triangle

66° + b = 140°

b = 140° -66
= 74°

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