today in geometry… warm up: advanced angles practice review for ch. 4 quiz ch. 4 quiz –...
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TODAY IN GEOMETRY…
Warm Up: Advanced Angles Practice
Review for CH. 4 QUIZ
CH. 4 QUIZ – TODAY!
WARM UP: Find all missing angles.
37 °143 ° 37 ° 58 °
37 °
Add a right angle!
53 °
48 °
84 °96 °
26 °
26 °
69 °111°
69 °
REVIEW: Classifying Triangles
Ways to classify triangles by SIDES:Scalene – no congruent sidesIsosceles – 2 congruent sidesEquilateral – All congruent sides
Ways to classify triangles by ANGLES:Acute – All angles less than 90 degreesRight – One angle is 90 degreesObtuse – One angle is greater than 90 degreesEquiangular – All angles are congruent
1
32
∠𝟏+∠𝟐+∠𝟑=𝟏𝟖𝟎 °
REVIEW: Finding Interior and Exterior Angles for Triangles
TRIANGLE SUM THEOREM
EXTERIOR ANGLE
THEOREM1
32
∠𝟏+∠𝟐=∠𝟒
4
REVIEW: Find the value of x. Then classify the triangle by its angles.
Use triangle sum theorem:
OBTUSE
31 °
93 °
Use triangle sum theorem:
ACUTE
58 °
59 °
63 °Linear pairs:
RIGHT
120 °30 °
CHAPTER 4 QUIZ You have the rest of class to complete your quiz Are you prepared? Pencil? Calculator? Yellow notes allowed If you finish early:
Finish any missing assignments. Work on something quietly as the rest of
your fellow classmates complete their quizzes.
NO TALKING. STAY IN YOUR SEATS. RETURN ANY BORROWED BOOKS AND
CALCULATORS. Turn in any missing or corrected assignments.
HOMEWORK:
Reminder: All assignments due before Thanksgiving Break
If finished, work on other assignments:
HW #1: 221: 1-26, 32, 35-37HW #2: Pg. 228: 3-10, 15-16, 19-21 Pg. 231: 33-40
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