Bell Ringer Warm up Quizizz code 795374 After

Bell Ringer • Warm up Quizizz code: 795374 • After you’ve been checked off, you can work on your 9 week IXL plan. If you need more skills, please ask!

Standard • We are starting a NEW UNIT!!! • Geometry • 7. GB. 4 - understand angle measures and simple equations to find missing angles – Day 1 - classifying angles and finding missing angle measures – Day 2 - missing angle equations

Today’s Agenda • Complementary vs Supplementary Angles • Missing Angles in Figures • Missing Angles exit ticket • Missing Angles Challenge Puzzle

Vocabulary Review- GOOGLE image search • complementary angles: angles that add to 90 degrees • supplementary angles: angles that add to 180 degrees. All triangles are supplementary.

Guided practice: classify each angle and determine the missing measurement

Guided practice: classify each angle and determine the missing measurement

Partner practice: classify each angle and determine the missing measurement 3. 4. 5.

Answers 3. 4. 5.

Missing Angles in Figures • use knowledge of angles to find missing measurements • use complementary and supplementary angles to find values • break down each figure into smaller pieces

Answer: a = 36 1. Use supplementary angles 78 and unmarked angle 180 -78 = 102 2. Then add 42 + 102 + a =180 3. 180 – 144 = 36

1. Find x X = 180 -61 x = 119 2. Find y y= 180 - 153 y = 27 3. Use x and y to find z 27 + 119 + z = 180 - 146 = 34 z = 34

128

Exit ticket- choose 2 problems and find the missing angle measures-complete on your post it and turn in!!! 2. 1. 4. 5. 3. 6.

***Challenge***

***Challenge***

***Challenge***