1 / 13

3.1 Lines and Angles

3.1 Lines and Angles. Parallel Lines Coplanar lines that do not intersect. The symbol || means “is parallel to.”. 3.1 Lines and Angles. Skew Lines Are noncoplanar They are not parallel and do not intersect. 3.1 Lines and Angles. Parallel Planes Planes that do not intersect.

wyome
Download Presentation

3.1 Lines and Angles

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 3.1 Lines and Angles • Parallel Lines • Coplanar lines that do not intersect. • The symbol || means “is parallel to.”

  2. 3.1 Lines and Angles • Skew Lines • Are noncoplanar • They are not parallel and do not intersect.

  3. 3.1 Lines and Angles • Parallel Planes • Planes that do not intersect.

  4. Identifying Nonintersecting Lines and Planes • In the figure, assume that lines and planes that appear to be parallel are parallel. • Which segments are parallel to AB? • Which segments are skew to CD? • What are two pairs of parallel planes? • What are two segments parallel to plane BCGF?

  5. Identifying Nonintersecting Lines and Planes A. B. C. D.

  6. Transversal • A transversal is a line that intersects two or more coplanar lines at distinct points. • Angles 3, 4, 5, and 6 are lie inside of ℓ and m, so they are interior angles. • Angles 1, 2, 7, and 8 lie outside of ℓ and m, so they are exterior angles.

  7. Angle Pairs formed by Transversals • Alternate Interior Angles • Nonadjacent interior angles that lie on opposite sides of the transversal.

  8. Angle Pairs formed by Transversals • Same-Side Interior Angles • Interior angles that lie on the same side of the transversal.

  9. Angle Pairs formed by Transversals • Corresponding Angles • Corresponding angles lie on the same side of the transversal t and are in corresponding positions.

  10. Angle Pairs formed by Transversals • Alternate Exterior Angles • Nonadjacent exterior angles that lie on opposite sides of the transversal.

  11. Identifying an Angle Pair • Name a pair of alternate interior angles.

  12. Classifying an Angle Pair • The photo shows the Royal Ontario Museum in Toronto, Canada. Are angles 1 and 3 alternate interior angles, same-side interior angles, corresponding angles, or alternate exterior angles? • Corresponding Angles!

  13. More Practice!!!!! • Classwork – Textbook p. 144 #11 – 42 ALL!! • Homework – Finish classwork.

More Related