Question

Please answer this question ​

Answer 1

Answer:

we know that

given

so

120-40

=80

by. exterior angle

Step-by-step explanation:

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Answer 2

Answer:

The value of y is:

= y + 120 = 180                   [Linear Pair]

= y = 180 - 120

= y = 60°

The value of x is:

= 40° + 60° + ∠BCA = 180°            [Angle Sum Property Of Triangle]

= 100° + ∠BCA = 180°

= ∠BCA = 180° - 100°

= ∠BCA = 80°

= ∠BCA + x = 180°      [Linear Pairs]

= 80° + x = 180°

= x = 180° - 80°

= x = 100°