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# D ay 1 triangles

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### Transcript

• 1. AIM: Classify Triangles Do Now 1
• 2. Pages 532-533 #6-10 all, 13, 14, 22, 23 2
• 3. Who was Euclid? 3
• 4. Anticipatory Set: Write the definition of each type of angle and then draw each type of angle. Acute Angle Right Angle Obtuse Angle Straight AngleDefinitionDrawing 1.) Draw an additional line segment that will change the acute, obtuse, and right angles into triangles. 2.) Why can the straight angle not be changed into a triangle if you drew only one additional line segment? 4
• 5. Classifying Triangles by Angle Measures1.) Acute Triangle: A triangle where all angles are acute.2.) Obtuse Triangle: A triangle that has one obtuse angle.3.) Right Triangle: A triangle that has one right angle.Classifying Triangles by Side Lengths4.) Scalene Triangle: A triangle that has no congruent sides.5.) Isosceles Triangle: A triangle that has at least twocongruent sides.6.) Equilateral Triangle: A triangle that where all of the sidesare congruent. 5
• 6. THINK-PAIR-SHAREClassify each triangle according to its sides and angles. a.) b.) 6
• 7. 1 Indentify the triangle  below. A Equilateral Triangle B Isosceles Acute Triangle C Isosceles Right Triangle D Isosceles Obtuse Triangle E Scalene Acute Triangle F Scalene Right Triangle G Scalene Obtuse Triangle 1 2 4 3 7
• 8. 2   A   B   C   D   E   F   G   1 2 4 3 8
• 9. 3   A   B   C   D   E   F   G   1 2 4 3 9
• 10. 4   A   B   C   D   E   F   G   1 2 4 3 10
• 11. 5   A   B   C   D   E   F   G   1 2 4 3 11
• 12. 6   A   B   C   D   E   F   G   1 2 4 3 12
• 13. 7   A   B   C   D   E   F   G   1 2 4 3 13
• 14. 8   A   B   C   D   E   F   G   1 2 4 3 14
• 15. 9   A   B   C   D   E   F   G   1 2 4 3 15
• 16. BEFORE YOU LEAVE: Trade-a-Triangle1.) Create a triangle with your partner.2.) Exchange the example with the other partnership in yourgroup and classify their triangle by the sides and angles. 16
• 17. Mr. Tjerslands Math 7Homework: Pages 376-377 #1-3 all, 5-7 all, 9-11 all, 15-17 all, 24, 25, 32-36 all 17
• 18. AIM: Classify Triangles10 Indentify the triangle  below. A Equilateral Triangle B Isosceles Acute Triangle C Isosceles Right Triangle D Isosceles Obtuse Triangle E Scalene Acute Triangle F Scalene Right Triangle G Scalene Obtuse Triangle 18