
8.1 lines and angles
... classified according to their angle measure: ACUTE angles have measures between 0 and 90 RIGHT angles measure exactly 90 OBTUSE angles have measures between 90 and 180 STRAIGHT angles measure exactly 180 We will not work with angles measuring over 180 . ...
... classified according to their angle measure: ACUTE angles have measures between 0 and 90 RIGHT angles measure exactly 90 OBTUSE angles have measures between 90 and 180 STRAIGHT angles measure exactly 180 We will not work with angles measuring over 180 . ...
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... • The Alternate Interior Angles Theorem states that, when two parallel lines are cut by a transversal, the resulting alternate interior angles are congruent. – A Transversal is a line that intersects a system of other lines. ...
... • The Alternate Interior Angles Theorem states that, when two parallel lines are cut by a transversal, the resulting alternate interior angles are congruent. – A Transversal is a line that intersects a system of other lines. ...