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Understanding Triangle Classification: Angles and Sides

In this chapter, you'll learn how to identify and classify triangles based on their angles and side lengths. You'll explore types of triangles, including equilateral, isosceles, scalene, acute, right, and obtuse triangles. The standard focuses on measures of sides and angles in triangles. Through examples and exercises, you’ll practice classifying triangles and learn the relationships between different types. Be sure to complete your homework to reinforce what you've learned, or you might meet Pyramid Head!

francesca-lucas
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Understanding Triangle Classification: Angles and Sides

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  1. Geometry OTQ Are you ready for this chapter? pg. 235 1 – 3, 5, and 6

  2. Homework Questions?

  3. What will I be able to do? Identify and classify triangles by angles and sides What standard will I learn? 12.0 Students find/use measures of sides/angles of triangles

  4. 4.1 Triangles and Angles

  5. Equiangular (all  s) Acute (3 acute s) Right (1 right ) Obtuse (1 obtuse ) Equilateral (3  sides) Isosceles (2  sides) Scalene (0  sides) Classifying Δs (angles vs sides) 40 80 60 120

  6. What kind of triangle does the cable-suspension of this bridge have? RIGHT TRIANGLE!!!!

  7. Example 1: Classify each triangle by its angles and sides. 1. MNQ 2.NQP 3. MNP acute; equilateral obtuse; scalene acute; scalene

  8. Example 2: Classify the triangle by the description given: A) Side lengths: 3 in, 5 in, 3 in Isosceles B) Side lengths: 3 ft, 5 ft, 4 ft Scalene C) Angle measures: 60°, 90°, 30° right D) Angles measures: 10°, 160°, 10° obtuse

  9. Pencils Down! Complete the sentence with always, sometimes, or never. • A scalene is ________ an equilateral . • A right ________ has an angle of 90°. • An isosceles triangle is __________ an equilateral . never always sometimes

  10. SUMMARY

  11. CLASSWORK Pages 241 – 242 #’s 22 – 36 even, 40 – 46 even Homework is on the next slide

  12. HOMEWORK Page 244 #’s 74 – 80 even Do your homework….or Pyramid Head will be sent to your house!!!

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