Cpctc and isoscels traingle

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Cpctc and isoscels traingle

  1. 1. 11/22/13 Gt Geometry Drill Given E is the midpoint of 
MJ; TE perpendicular to MJ Prove Triangle   T M E J
  2. 2. Geometry Objective STW prove 
triangles are 
congruent using our 
new shortcuts!
  3. 3. Recall According to the 
definition of congruent 
triangles If two triangles 
are congruent, then their 
corresponding parts are 
congruent.
  4. 4. CPCTC Corresponding Parts of Congruent Triangles are Congruent
  5. 5. Copy and Prove Given:FG = OG,    bisects FO GR Prove: F    O
  6. 6. 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
  7. 7. Objective: STW develop and apply the Isosceles 
Triangle Theorem
  8. 8. Do you remember? What is the definition 
of an isosceles 
triangle?
  9. 9. ISOSCELES TRIANGLE vocabulary legs vertex angle base base angles C B A
  10. 10. Isosceles Triangle Theorem If two sides of a triangle are 
congruent, then the angles 
opposite those sides are 
congruent. C B A
  11. 11. ??????????????????????? Is the converse true?
  12. 12. Converse Isosceles 
Triangle Theorem If two angles of a triangle 
are congruent, then the 
sides opposite those 
angles are congruent.
  13. 13. Eyes on Isosceles 
Triangles

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