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Lesson 4-1

Lesson 4-1. Classifying Triangles. Ohio Content Standards:. Ohio Content Standards:. Formally define geometric figures. Ohio Content Standards:. Use coordinate geometry to represent and examine the properties of geometric figures. Ohio Content Standards:.

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Lesson 4-1

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  1. Lesson 4-1 Classifying Triangles

  2. Ohio Content Standards:

  3. Ohio Content Standards: Formally define geometric figures.

  4. Ohio Content Standards: Use coordinate geometry to represent and examine the properties of geometric figures.

  5. Ohio Content Standards: Make and test conjectures about characteristics and properties (e.g., sides, angles, symmetry) of two-dimensional figures and three-dimensional objects.

  6. Ohio Content Standards: Represent and analyze shapes using coordinate geometry.

  7. Acute Triangle

  8. Acute Triangle All angles are acute.

  9. Obtuse Triangle

  10. Obtuse Triangle One angle is obtuse.

  11. Right Triangle

  12. Right Triangle One angle is right.

  13. Equiangular Triangle

  14. Equiangular Triangle An acute triangle with all angles congruent.

  15. The triangular truss below is modeled for steel construction. Classify JMN, JKO, OLN as acute, equiangular, obtuse, or right. M L K J N O

  16. Scalene Triangle

  17. Scalene Triangle No two sides of the triangle are congruent.

  18. Isosceles Triangle

  19. Isosceles Triangle At least two sides of the triangle are congruent.

  20. Equilateral Triangle

  21. Equilateral Triangle All of the sides of the triangle are congruent.

  22. V Y Z W T U X

  23. V Y Z W T U X Isosceles Triangles

  24. V Y Z W T U X Scalene Triangles

  25. Find d and the measure of each side of equilateral triangle KLM if KL = d + 2, LM = 12 – d, and KM = 4d – 13.

  26. Find the measures of the sides of RST. Classify the triangle by sides. S (4, 4) T (8. -1) R (-1, -3)

  27. Assignment:Pgs. 181-183 14-18 all, 22-27 all, 32-36 evens

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