anonymous
  • anonymous
The figure below shows a parallelogram PQRS. The flowchart shown below shows the sequence of steps to prove the theorem, Opposite angles of a parallelogram are equal. Which option best represents x and y? (5 points) x = angle 1 is equal to angle 6 and y =corresponding angles x = angle 5 is equal to angle 3 and y = interior opposite angles x = angle 5 is equal to angle 6 and y = supplementary angles x = angle 4 is equal to angle 3 and y = alternate interior angles
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
anonymous
  • anonymous
oohh i didnt know it was that kind, sorry i cant help you there
anonymous
  • anonymous
ok

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anonymous
  • anonymous
@LynFran
LynFran
  • LynFran
i think D
anonymous
  • anonymous
Why tho?
LynFran
  • LynFran
because if u look at the top ..angle 1=angle2 so angle 3 must = angle 4
LynFran
  • LynFran
http://www.mathopenref.com/parallelogramangles.html
LynFran
  • LynFran
look how the angles are = in the link provided
anonymous
  • anonymous
o ok. and can I ask you another question?
LynFran
  • LynFran
sure
anonymous
  • anonymous
Look at the quadrilateral shown below. Elba writes the following proof for the theorem, If the diagonals of a quadrilateral bisect each other, the quadrilateral is a parallelogram. Elba's proof 1. For triangles AOB and COD, angle 1 is equal to angle 2 as they are vertical angles. 2. AO = OC and BO = OD because it is given that diagonals bisect each other. 3. Therefore, the triangles AOB and COD are congruent by SAS postulate. 4. Similarly, triangles AOD and COB are congruent. 5. By CPCTC, angle ABD is equal to angle CDB and angle ADB is equal to angle CBD. 6. As the corresponding angles are congruent, the opposite sides of quadrilateral ABCD are parallel. 7. Therefore, ABCD is a parallelogram. Which is the first incorrect statement in Elba's proof? (5 points) Statement 6 Statement 4 Statement 3 Statement 5
anonymous
  • anonymous
anonymous
  • anonymous
k
LynFran
  • LynFran
statement 3 and 4 correct
anonymous
  • anonymous
So it is either 6 or 5 that is not correct?
LynFran
  • LynFran
yes thats what im trying to figure out which 1 of the 2 is incorrect i cant remember the CPCTC principle..
anonymous
  • anonymous
https://www.google.com/search?q=cptc+principle&oq=cptc+principle&aqs=chrome..69i57.6013j0j1&sourceid=chrome&es_sm=93&ie=UTF-8#q=cpctc+geometry
anonymous
  • anonymous
I think it is 6.
anonymous
  • anonymous
it is 6. thank you for your help
LynFran
  • LynFran
ok
LynFran
  • LynFran
welcome

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