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WARM UP

WARM UP. 1. . 2 . . 3.3 Classifying Triangles 11/6 EQ: How do we classify triangles? . How do you classify this triangle?. Are these sides congruent?. X. These sides LOOK congruent. All triangles have 3 sides (polygon). - The sum of a triangle’s angles equal 180 degrees.

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WARM UP

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  1. WARM UP 1. 2.

  2. 3.3 Classifying Triangles 11/6 EQ: How do we classify triangles?

  3. How do you classify this triangle?

  4. Are these sides congruent? X These sides LOOK congruent.

  5. All triangles have 3 sides (polygon). - The sum of a triangle’s angles equal 180 degrees. • Name Triangle: • Name Sides: • Vertices: • Angles: W X Y

  6. CLASSIFYING TRIANGLES BY ANGLES • ACUTE TRIANGLES – all angles are acute (less than 90 degrees) A B T

  7. RIGHT TRIANGLES - have ONE right angle (90 degrees). A P T

  8. OBTUSE TRIANGLES have ONE obtuse angle (larger than 90 degrees). C A R

  9. CLASSIFYING TRIANGLES BY SIDES • A Scalene triangle has NO congruent sides 12 6 14

  10. An ISOCELES TRIANGLE has two congruent sides. 5 5 3

  11. An Equilateral triangle has three congruent sides 4 4 4

  12. 5 5 7 Isosceles - two congruent sides Obtuse - one obtuse and two acute angles This is an obtuse triangle.

  13. YOU TRY!

  14. EXIT TICKET Classify each triangles by is ANGLES and its SIDES.

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