find the size of each marked angle in the following figure.
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you can get b with the help of linear pair and that angle by50° and a by corresponding angles
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110+b=180 (sum of same side interior angles) b=180-110
= 70
50+a=180 (same side interior angles btw two parallel lines)
a=180-50
=130
= 70
50+a=180 (same side interior angles btw two parallel lines)
a=180-50
=130
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