Cpctc and isoscels traingle
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Cpctc and isoscels traingle

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Cpctc and isoscels traingle Cpctc and isoscels traingle Presentation Transcript

  • 11/22/13 Gt Geometry Drill Given E is the midpoint of 
MJ; TE perpendicular to MJ Prove Triangle   T M E J
  • Geometry Objective STW prove 
triangles are 
congruent using our 
new shortcuts!
  • Recall According to the 
definition of congruent 
triangles If two triangles 
are congruent, then their 
corresponding parts are 
congruent.
  • CPCTC Corresponding Parts of Congruent Triangles are Congruent
  • Copy and Prove Given:FG = OG,    bisects FO GR Prove: F    O
  • GT Geometry Drill Put homework on your desk with a pen . Draw two segments on your paper, one 
7 cm long and the other 9 cm long. Construct a triangle with two sides 
congruent using the segments you drew. Changes and updates
  • Objective: STW develop and apply the Isosceles 
Triangle Theorem
  • Do you remember? What is the definition 
of an isosceles 
triangle?
  • ISOSCELES TRIANGLE vocabulary legs vertex angle base base angles C B A
  • Isosceles Triangle Theorem If two sides of a triangle are 
congruent, then the angles 
opposite those sides are 
congruent. C B A
  • ??????????????????????? Is the converse true?
  • Converse Isosceles 
Triangle Theorem If two angles of a triangle 
are congruent, then the 
sides opposite those 
angles are congruent.
  • Eyes on Isosceles 
Triangles