1 / 8

GBK Geometry

GBK Geometry. Jordan Johnson. Today’s plan. Greeting Review Asg #26 Lesson: Proof Lab Clean-up. A Recipe for Proof. State the givens. State what to prove. Sketch a diagram. Make a “rough draft”: On scratch paper , state easy-to-prove facts.

tyrell
Download Presentation

GBK Geometry

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. GBK Geometry Jordan Johnson

  2. Today’s plan • Greeting • Review Asg #26 • Lesson: Proof • Lab • Clean-up

  3. A Recipe for Proof • State the givens. • State what to prove. • Sketch a diagram. • Make a “rough draft”: • On scratch paper, state easy-to-prove facts. • Mark equal parts on your diagram.(A different color helps, here!) • Find what would immediately prove the result. • Pick the facts you need for the proof. • Write the proof (or as much as you can).

  4. Rules of thumb • Proving angle/segment equations?Try using congruence.Corresponding parts of congruent triangles are equal. • Proving congruence? Use ASA or SAS. • Remember old ways, too: • See triangles & angles? Triangle Angle-Sum Thm. • See a right triangle? Pythagorean Thm.

  5. Triangle Proof #1

  6. Proof • 1 and 2 are verticalangles. (Given.) • G is the midpoint of HF.(Given.) • H = F. (Given.) • HG = GF. (By definition of midpoint.) • 1 = 2. (Vertical angles are equal.) • GHI  GFE (by ASA).

  7. Assignments • For Tuesday: Asg #27 • Now, to the lab! • Bring your journal • Work on: • Go to Schoology; join this course: HGQFN-5QJ2S • Khan Academy – 10+ min, logged in • Problems on Geometric Figures • The circle center puzzle (either version) • Constructions (from the Log)

  8. Clean-up / Reminders • Pick up all trash / items. • Push in chairs (at front and back tables). • See you tomorrow!

More Related