The radius of a circle is a line, which starts at the ... note that since triangle AOB is isosceles, then \(\angle OAB=\angle OBA\). \(\angle AOC\) is a straight angle, so will add up to \(180 ...
Parallel lines are straight lines which have the same ... lines meet an intersecting transversal, pairs of angles with particular properties are made. Corresponding angles are equal.
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