1.

Q5Find the values of x.of x and y in the following figures :-i.​

Answer»

Answer : Angles on one SIDE of a straight line always add to 180

o

.

So, if we take the side below line AB, then

⟹3x+60

o

=180

o

⟹3x=180

o

−60

o

=120

o

⟹x=40

o

.

Similarly if we take the side above line AB, then

⟹y+90

o

+x=180

o

⟹y+90

o

+40

o

=180

o

⟹y=180

o

−90

o

−40

o

⟹y=50

o

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