Fill in the blanks to make the statements true.

Two lines in a plane which do not meet at a point anywhere are called ________lines.

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If a transversal intersects two parallel lines, then

corresponding angles are on the ________ side of the transversal.

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If a transversal intersects two parallel lines, then

alternate interior angles are on the ______ side of the transversal.

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Two angles forming a __________ pair are supplementary.

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The supplement of an acute is always __________ angle.