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Chapter 4009 isiocs triangles
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Chapter 4009 isiocs triangles

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Transcript

  • 1. GT Geometry 12/11/121. Draw two segments on your paper, one 7 cm long and the other 9cm long.2. Construct a triangle with two sides congruent using the segments you drew.
  • 2. Objective:To develop and applythe Isosceles Triangle Theorem
  • 3. Do you remember?What is the definition of an isosceles triangle?
  • 4. ISOSCELES TRIANGLE vocabularylegs Qvertex anglebasebase angles Y P
  • 5. Isosceles Triangle Theorem If two sides of a triangle are congruent, then the angles opposite those sides are congruent. C B A
  • 6. ???????????????????????Is the converse true ?
  • 7. Converse Isosceles Triangle TheoremIf two angles of atriangle are congruent,then the sides oppositethose angles arecongruent.
  • 8. ????????What if I bisect the vertex angle, what can youtell me? x 70º
  • 9. ????????Find basex –1 2 3x + 3 9 –x
  • 10. ????????x70º
  • 11. ????????Find the missing angles x 70º
  • 12. Eyes on Isosceles Triangles