SETUP DIRECTIONS Please take out Assignment Calendar and

SETUP DIRECTIONS Please take out Assignment Calendar, and Copy Tonight’s HW Materials on your desk: Drill, HW: Silly Segments and Awesome Angles Place your HW in the INBOX! Begin your drill! (located on the back table)

HGEO Warm-up: 9/23 and 9/24 1) In the figure below, and Name: __________ Date: ______ Pd: _____ is perpendicular to Find the 2)Two complementary angles have the measures of (4 x – 3)° and (2 x + 9)°. What is the value of x? 3) FH is longer than GI by 13 units. What is the value of x?

Mastery Objectives We will use the segment addition postulate to determine the length of a segment(s). the angle addition postulate to determine the measure of an angle(s). Review special parts of a triangle including medians, perpendicular bisectors, angle bisectors, and altitudes.

Agenda Copy HW/Drill Collect and Check HW Group Activities Group Assigned Problems Gallery Walk Capture and Categorize Angles Graded Papers/Missing Work Reports Class Activity Review of Special Parts of Triangle Tic-Tac-Toe Independent Activity Quiz 2 – Segments, Angles, & Special Centers

Homework Unit 1 Review Part 1

Coming Up in Geometry Wed 9/23, Thurs 9/24 Review Segment and Angle Addition Unit 1 Review Fri 9/25, Tues 9/29 Transformations: Reflections & Translations Unit 1 Review Wed 9/30, Thurs 10/1 Transformations: Rotations/Unit 1 Review Fri 10/2, Mon 9/29 Unit 1 Test

HW Questions What questions did you have trouble with on the homework?

Group Assigned Problems

Group Directions As a group, 1. Solve the problem. 2. Put picture and explanation on poster paper. 3. Hang up the poster using magnets (in the front of room)

Practice Problems – Group 1 If DF = 48, find the value of x. Then find DE and EF.

Practice Problems – Group 2 If GI = 51, find the value of y. Then find GH and HI.

Practice Problems – Group 3 If AC = 63, find the value of z. Then find AB and BC.

Practice Problems – Group 4 Find the value of x. Find and . O P S M

Practice Problems – Group 5 Find the value of x. Find and . T S R N

Practice Problems – Group 6 If Find , find the value of y. and.

Practice Problems – Group 7 If , then find (x + 40)° 1 (2 x + 10)° 2 (x + 30)° 3 4 (3 x – 20)°

Practice Problems – Group 8 Find the

5 minutes Gallery Walk Part 1 • Setup the equation for each review problem! • Do not solve the equation! • Check your answer around the room.

5 minutes Gallery Walk Part 2 • Check your equation answers. • Solve three hardest problems for you!! • Check your answers

Capture and Categorize Angles

Capture and Categorize Angles 1. Find the missing envelope labeled with your group name. 2. Empty out the contents. 3. Separate and categorize the contents. 4. Using the whiteboards provided, write a reason to justify your group’s categorization. 5. Signal your instructor when you have finished. 6. Your instructor will give you additional directions.

Capture and Categorize Angles Excellent! Congratulations on categorizing your angles! Now, you must find all the missing variables and write your results below… It’s a race to the finish, so hurry it up! Variables X= Y= Z= A= B= C= D= E= Solution What Type of Angles Are We?

Graded Papers and Missing Work Reports Missing Work is due by Friday of this week.

Graded Papers and Missing Work Reports Progress Reports will arrive on Friday!

Tic-Tac-Toe Review

Game 1 Game 2

Tic-Tac-Toe: Special Centers Write down the following words in any order on your tic-tac-toe board: Concurrent Circumcenter Orthocenter Incenter Centroid Angle Bisector Perpendicular Bisector Median Altitude

Tic-Tac-Toe: Special Centers First person with three in a row wins!

Question 1 I am a special segment that comes from a vertex and splits two angles in half.

Question 2 I am a special center that results from concurrent perpendicular bisectors.

Question 3 I am a special segment whose endpoints comes from a vertex and the midpoint of two equal sides.

Question 4 I am a special center that results in concurrent medians.

Question 5 I am a special center that results in concurrent angle bisectors.

Question 6 Three or more lines that cross at a single point are called __________.

Question 7 I am a special segment whose endpoints come from a vertex and a right angle on the opposite side.

Question 8 I am a special segment who creates a right angle and two equal segments.

Question 9 I am a special center that results from concurrent altitudes.

HGEO Quiz: Segments, Angles, & Special Parts Name: __________ Date: ______ Pd: _____ 1) If RS = 3 x + 1, ST = 2 x - 2, and RT = 64. (a) Find the value of x = _______ (b) RS = _______ (c) ST = _____ 2) Using the diagram on the right, find the value of y. 3) If , find the value of x and the measure of each missing angle. Directions: Match each term to its corresponding correct definition. 4) circumcenter 5) concurrent 6) incenter 7) point of concurrency 8) centroid _____ _____ a) The point at which three or more lines are concurrent. b) The special center for the angle bisectors. c) The special center for the perpendicular bisectors. d) Three or more lines that intersect at one point. e) The special center for the medians.