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2.7 – Triangles

2.7 – Triangles. All sides are ≅. CLASSIFICATION BY SIDES. leg. leg. 2 Sides ≅. CLASSIFICATION BY SIDES. base. No sides are ≅. CLASSIFICATION BY SIDES. All angles are ≅. CLASSIFICATION BY ANGLES. All angles are acute. CLASSIFICATION BY ANGLES. hypotenuse. leg. One right angle.

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2.7 – Triangles

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  1. 2.7 – Triangles

  2. All sides are≅ CLASSIFICATION BY SIDES

  3. leg leg 2 Sides ≅ CLASSIFICATION BY SIDES base

  4. No sides are≅ CLASSIFICATION BY SIDES

  5. All angles are≅ CLASSIFICATION BY ANGLES

  6. All angles are acute CLASSIFICATION BY ANGLES

  7. hypotenuse leg One right angle CLASSIFICATION BY ANGLES leg

  8. One obtuse angle and 2 acute angles CLASSIFICATION BY ANGLES

  9. Classify the triangle by the best definition based on sides and angles. Then find the sum of the interior angles.

  10. scalene right

  11. equilateral equiangular

  12. isosceles obtuse

  13. 4. The sum of ANY triangles interior angles is 180°. Use this fact to solve for xbelow.

  14. x + 75 + 54 = 180 x + 129 = 180 x = 51

  15. 2x + 3x + 55 = 180 5x + 55 = 180 5x = 125 x = 25

  16. 4x – 1 + 3x + 90 = 180 7x + 89 = 180 7x = 91 x = 13

  17. A = ½(12)(5) A = ½(12)(5) A = ½(12)(5) A = 30 un2 A = 30 un2 A = 30 un2

  18. Triangle: h h b b

  19. Add the 3 sides

  20. 4. If the area of the triangle is 63cm2, find the height of the triangle.

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