1 / 8

Mastering Geometry Proofs: A Step-by-Step Guide

Today's lesson focuses on proof strategies in geometry, from stating givens to writing proofs. Learn key rules and tools to excel in triangle proofs and homework assignments. Engage with practice exercises and test corrections for a thorough understanding. Follow clean-up instructions for a productive lab session. Sharpen your skills and boost your confidence in geometry proofs with this comprehensive guide.

yadid
Télécharger la présentation

Mastering Geometry Proofs: A Step-by-Step Guide

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 • 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. Homework • Unit 3 Test Corrections – due Tuesday, 11/13. • Answers must be correct for credit – so check! • From Ch. 4, Lesson 3 (pp. 148-149): • Exercises #1-26. • Bonus: Set III. • Due Tuesday, 11/13. • Now, to the lab!

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

  7. Triangle Proof #1

  8. 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).

More Related