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Welcome! Tear-‐Out: Pg. 286-‐287, 294 (pg. 289 should be torn out from last semester) U4H4: Pg. 289 #11-‐12, 15 Pg. 294 #10a, 10c Communications Project Due 1/11
Updates: U4Q2 (Activity 19-‐21) 1st will be Thursday 1/14 4th/6th will be Friday 1/15
Agenda 1. Collect U4Q1 Corrections
2. Fix Notebook
3. Activity 20-‐2
4. Begin Activity 21-‐1
5. Exit Ticket
Fix Notebook Ø One person from each team come to the front and grab one piece of colored paper per person, 1 glue stick, and 1 pair of scissors.
Ø Fold the colored paper in half the way that I show you, then cut along the folded line.
Ø We are making pockets on the next open page in your notebook as a safe place to store your homework’s and quizzes/exit tickets. I folded each half sheet as I will show you.
Fix Notebook Ø Glue each half sheet to your notebook; I would also tape it when you get home.
Ø Title one side: Homework Unit 4 Ø Title the other side: Quizzes + Exit Tickets Unit 4
When you receive homework or quizzes this is where you will bile them such that they do not get lost. Please have one person from your team return the materials and please throw away any scraps.
Learning Objectives By the end of this period you will be able to: Ø Use the converse of the Pythagorean Theorem to solve problems.
Ø Develop and apply Pythagorean Inequalities. Team Collaboration: ü What is the Pythagorean Theorem? What do you predict the converse of the Pythagorean Theorem is?
ü What do you predict Pythagorean Inequalities entails?
Activity 20-‐2 Pg. 286 Answer question #1(a-‐c) with your teammates.
Activity 20-‐2 Continuing off of last semesters Pythagorean Triples. Converse of the Pythagorean Theorem o If a2 + b2 = c2, then the triangle is a right triangle. o Pg. 286 #1c is an example.
Team Collaboration ü What if a2 + b2 did not equal c2 ? What type of triangle(s) could it be?
Activity 20-‐2 Investigation Question to answer: What happens when a2 + b2 does not equal c2 ?
Ø One person from your team must come up front and take one bag of straws and one grid paper.
Ø Cross off step 1 on pg. 287. Ø You will have 5 minutes to complete the chart. If you have questions please have one person in your group raise their hand. When you Sinish please raise your hand and I will quickly check your teams work.
Activity 20-‐2 Investigation Question to answer: What happens when a2 + b2 does not equal c2 ?
TIPS: Note: blue(13cm), red(12cm), green(15cm), yellow(6cm), purple(5cm) Remember: the longest side is the hypotenuse this fact might help you Sind the correct triangle.
Activity 20-‐2 Pg. 287
Activity 20-‐2 Pythagorean Inequalities o If c2 > a2 + b2, then the triangle is obtuse. o If c2 < a2 + b2, then the triangle is acute. o If c2 = a2 + b2, then the triangle is right. o If the sum of two side lengths is less than or equal to the third, then the side lengths do not form a triangle.
Team Collaboration ü There were two sets of side lengths that did not create a triangle… How can we easily identify this? Find a pattern.
Activity 20-‐2 You may use a calculator. J Please have one person from your table return the materials from the activity.
Activity 20-‐2 Team Collaboration ü Imagine you are building a frame for the roof of a house. I provide you with the following pieces of wood with lengths 20 feet, 20 feet, and 35 feet. What type of triangle would the frame create? Discuss in your teams and provide some type of reasoning for your solution.
Activity 20-‐2 Team Collaboration ü Imagine you are building a frame for the roof of MY house. I provided you with the following pieces of wood with lengths 20 feet, 20 feet, and 35 feet. I tell you I want my roof to be a right triangle… How could you meet my needs for the roof of the house? Make sure you are able to convince me that what you do will actually create a right triangle. J
Fix Notebook Ø One person from your team please come and take one stapler and staple pages 286-‐287 to the left side of U4A20 notes.
Ø Please update your table of contents.
Ø Open to the next new page and title the right side: U4A21 Special Right Triangles (39)
Activity 21-‐1 Right triangles are extremely common which is why we talk about them so often. SpeciSic right triangles are called Special Triangles. There are two types of Special Right Triangles: 1. 45-‐45-‐90 2. 30-‐60-‐90
Learning Objectives By the end of this period you will be able to: Ø Describe the relationships among the side lengths of 45°-‐45°-‐90° triangles.
Team Collaboration: ü What shape can produce two 45°-‐45°-‐90° triangles?
Activity 21-‐1 Deriving 45°-‐45°-‐90° Special Right Triangle o As we derive the triangle please copy what I do on the board. This type of triangle will be extremely important for future math courses.
Activity 21-‐1 Practice: Find the value of x. Give your answer in simplest radical form.
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again.
Whiteboards! Practice: Find the value of x. Give your answer in simplest radical form.
Exit Ticket Please put everything away except for a pencil, eraser, and calculator. You will have 5 minutes to complete the exit ticket; cover your own papers. When you are done please come place your exit ticket under the appropriate category on my desk: Green – Today went well! I think I remember everything! Yellow – Today went okay; I remembered some… Red – Today was rough… I don’t remember anything… Please check your desks; did you leave trash behind?
Timings Intro: 5mins 8:00 10:53 1:11 Fix Notebook: 10mins 8:10 11:03 1:21 Activity 20-‐2: 55mins 9:05 11:58 2:16 Begin Activity 21-‐1: 20mins 9:25 12:18 2:36 Exit Ticket: 10mins 9:35 12:28 2:46
Table 1 Table 2 Table 3 Braiden Nicole Natalee Lesile Evan Savannah Alyssa Dash Kia
Table 4 Table 5 Table 6 Table 7 Nikki Elina Matt Thania Ashik Eduardo Sophie Bryan Bella Grace Emmy Angie
Table 8 Table 9 Table 10 Table 11 Table 12
Casey Hana Yash Madison Amin Justin Jacob Kevin
Sherman Cameron Jake Alex
Table 1 Table 2 Table 3 Brandon Ricardo Jimmy Siffat Alisa Tyler Kevin Stephanie Emily
Table 4 Table 5 Table 6 Table 7 Michael Cynthia Parker Steven Brooke Alexi Neikon Maddy P. Maddie E. Yen Jordan Nate
Table 8 Table 9 Table 10 Table 11 Table 12
Sasha Georgia Priyanka Mia Bradley
Table 1 Table 2 Table 3 Arianna Gavin Trent Trevor Sam C. Fabiana Jenny Denise Manny
Table 4 Table 5 Table 6 Table 7
Lauren Amanda Sanam Philip Aidan Ryan Damien Athena Tanveen Anthony Anusha Sam P. Table 8 Table 9 Table 10 Table 11 Table 12 Raegan Camellia Jonathan Andrew Sahya Michaela Ceana Sam H. Alex Grace Guk