<h5>In the fig below, line l1 is parallel to line l2 and is perpendicular to line m. If a=b, what is the value of a?</h5>

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In the fig below, line l1 is parallel to line l2 and is perpendicular to line m. If a=b, what is the value of a?

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In the fig below, line l1 is parallel to line l2 and is perpendicular to line m. If a=b, what is the value of a?