Section 1
Definition: Transversals
Property
A transversal is a line that intersects two or more other lines at distinct points. When a transversal intersects two lines, it creates eight angles at the two intersection points.
In this Grade 7 lesson from Big Ideas Math, Advanced 2, students learn how to identify and find the measures of angles formed when parallel lines are cut by a transversal, including corresponding angles, interior angles, and exterior angles. Students apply the properties of corresponding angles, supplementary angles, and vertical angles to calculate unknown angle measures in multi-step problems. The lesson builds foundational geometry vocabulary and reasoning skills within Chapter 3: Angles and Triangles.
Section 1
Definition: Transversals
A transversal is a line that intersects two or more other lines at distinct points. When a transversal intersects two lines, it creates eight angles at the two intersection points.
Section 2
Parallel Lines
Parallel Lines are lines in the same plane that never intersect, no matter how far they are extended. Parallel lines are always the same distance apart and run in the same direction. We use the symbol to indicate that two lines are parallel. If line is parallel to line , we write .
Section 3
Vertical Angles
Vertical angles are opposite angles formed when two lines intersect. Vertical angles are always congruent: and .
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Section 1
Definition: Transversals
A transversal is a line that intersects two or more other lines at distinct points. When a transversal intersects two lines, it creates eight angles at the two intersection points.
Section 2
Parallel Lines
Parallel Lines are lines in the same plane that never intersect, no matter how far they are extended. Parallel lines are always the same distance apart and run in the same direction. We use the symbol to indicate that two lines are parallel. If line is parallel to line , we write .
Section 3
Vertical Angles
Vertical angles are opposite angles formed when two lines intersect. Vertical angles are always congruent: and .
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter