please solve this question
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40 is answer
angle acs + acb=180
acb=180-100
acb=80
now pq is parallel to rs
angle pab=abc. (alternate interior angles)
abc=60
apply angle sum property in triangle abc
abc+acb+bac=180
bac=180-60-80
bac=40
hope it helps
now as
angle acs + acb=180
acb=180-100
acb=80
now pq is parallel to rs
angle pab=abc. (alternate interior angles)
abc=60
apply angle sum property in triangle abc
abc+acb+bac=180
bac=180-60-80
bac=40
hope it helps
now as
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40°..................
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