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oohh i didnt know it was that kind, sorry i cant help you there
i think D
because if u look at the top ..angle 1=angle2 so angle 3 must = angle 4
look how the angles are = in the link provided
o ok. and can I ask you another question?
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
statement 3 and 4 correct
So it is either 6 or 5 that is not correct?
yes thats what im trying to figure out which 1 of the 2 is incorrect i cant remember the CPCTC principle..
I think it is 6.
it is 6. thank you for your help