Question

Answer this question with step​

Answer 1

Answer:

angle 100 = angle d ( vertically opposite angles )

angle 100 = angle c ( corresponding angles)

angle c + angle a = 180 ( co- interior angles)

100+ angle a = 180

therefore, a = 80

angle 100 = angle b ( alternate interior angles)

Answer 2

Answer:

d=100°( vertically opposite angle)

b=d=100°( corresponding angle)

a+b=180°( interior angles on same side of transversal are supplementary)

a=180°-b=180°-100°=80°

a+c=180°(interior angles on same side of transversal are supplementary)

c=180°-a=180°-80°=100°

so, d=b=c=100° and a=80°

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