Lines and Transversals

Identify angles formed when a transversal crosses lines.

Lesson 1 of 53 parts Practice Flashcards

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Parallel and Perpendicular Lines

Objective: Identify parallel, intersecting, and perpendicular lines.

In one plane, distinct parallel lines never intersect. Perpendicular lines intersect at right angles. Intersecting nonperpendicular lines meet without forming a right angle.

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Parallel and Perpendicular Lines

Objective: Identify parallel, intersecting, and perpendicular lines.

In one plane, distinct parallel lines never intersect. Perpendicular lines intersect at right angles. Intersecting nonperpendicular lines meet without forming a right angle.

Transversals and Angle Positions

Objective: Identify a transversal and angles at its two intersections.

A transversal intersects two or more coplanar lines at distinct points. Interior angles lie between the two lines; exterior angles lie outside them.

Transversal t crosses parallel lines l and m; the band between them is interior and the regions outside are exterior.

Corresponding and Alternate Angles

Objective: Distinguish corresponding, alternate interior, and alternate exterior positions.

Corresponding angles occupy matching positions at the intersections. Alternate interior angles lie inside on opposite sides of the transversal; alternate exterior angles lie outside on opposite sides.

Angles 1 to 4 at the upper intersection and 5 to 8 at the lower intersection, with example corresponding and alternate pairs.

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