Question

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Answer 1

Step-by-step explanation:

Here,

B = 100° ( being Alternate angle )

Also,

b + a = 180 ° ( being co interior angle)

100 + a = 180

a = 80 °

Again,

D = 100° ( being vertically Opposite angle)

Now,

C = B ( being crossponding angle of //)

c = 100°

Answer 2

Step-by-step explanation:

here,

l is parallel to m and p is parallel to q.

then

(vertical opposite angle )

since , l ║ m and q is the transversal line then

(angle on the same side of the transversal )

65 +d = 180°

d = 180-65

d = 115°

now p ║q  and m is the transversal line

c +d = 180°(angle on the same side of the transversal )

c + 115° = 180°

c = 180-115

c = 65°

similarly

b +c = 180°

b + 65°= 180

b = 180-65 = 115°

hence ,

The measure of the angles a, b, c, d are 65°,115°,65°,115°..

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