1 / 11

21 st Century Lessons

21 st Century Lessons. Area of Right Triangles. Mrs. Thompson Level 1. Agenda:. OBJECTIVE: SWBAT determine the area of any right triangle and defend their method. 1) Warm Up. 2) Getting Ready – Geometry Puzzles. 3) Launch – Strategies for Explore.

gabrielle-moreau
Download Presentation

21 st Century Lessons

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. 21st Century Lessons Area of Right Triangles Mrs. Thompson Level 1

  2. Agenda: OBJECTIVE: SWBATdetermine the area of any right triangle and defend their method. 1) Warm Up 2) Getting Ready – Geometry Puzzles 3) Launch– Strategies for Explore 4) Explore – Problem Set (Partners & Groups) 5) Summary – Share Solutions & Expand 6) Assessment– Find the Area

  3. Launch This is a right triangle. What is a right triangle? A right triangle is a triangle that has one 90⁰ angle. What is the area of this right triangle? How do you know? How can you show your work/prove your answer? = 1 square unit Agenda

  4. Launch What is the area of the shaded region? How do you know? How can you show your work/prove your answer? Agenda

  5. Explore – Understanding the Strategy • Angela’s Strategy • Draw a “surrounding rectangle” • Determine the area of the rectangle • The area of the triangle is half the area of the rectangle! Do you understand Angela’s strategy? Agenda

  6. Explore - More Part 3 - (10 Min) Finish the worksheet in GROUPS Use Angela’s Strategy to find the area of the remaining triangles on the worksheet. 1-Partners 2-Strategy Check 3-Groups Agenda

  7. Summary (Part 1) 9) 10) 11) 1) 2) 4) 3) 12) 13) 14) 5) 6) Create your own: Click here 7) 8) See All Solutions Agenda To Explore

  8. Summary (Part 2) • Explain the Strategy • Turn and Talk: • Lefty, tell Rightythe strategy for finding the area of ANY right triangle. • Righty, tell Leftythe strategy. • Common Language: • Can you explain the strategy we learned that will work for finding the area of ANY right triangle? • Why does this strategy work? Agenda

  9. Summary (Part 2) • Expand your Thinking • Does this strategy work when there are no grid lines? Agenda

  10. Summary (Part 2) Try It (As a Class): Draw and label a triangle with a base of 5 ft and a height of 10 ft. Then find the area. Area of “Rectangle”: 5 ft x 10 ft = 50 ft2 Area of Triangle 50 ft2 ÷ 2 = 25 ft2 10 ft Oh yeah… Half of 50 is 25! 5 ft Hmmm… Agenda

  11. Summary (Part 2) Independent Practice #1) Draw and label a triangle with a base of 8 in and a height of 3 in. Then find the area. Area of “Rectangle”: 8 in x 3 in = 24 in2 Area of Triangle 24 in2 ÷ 2 = 12 in2 3 in 8 in Oh yeah… Half of 24 is 12! Hmmm… Agenda

More Related