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avatar+683 

title says it all...
Im confused i don't get why...

 Oct 18, 2019
 #1
avatar+2824 
+2

The is wrong because when it says ALL, it means that EVERY symmetric line is a diagonal.

 

This can be proved wrong with a counterexample.

This here is a symmetric line, but not a diagonal

 Oct 18, 2019
 #2
avatar+683 
+1

oh 


i meant that the title explains the question but thanks CU :)

Nirvana  Oct 18, 2019
 #3
avatar+108626 
+2

A diagonal is just a line from a vertex to any other vertex.

 

Try it with a normal peice of rectangular paper.

 

Fold it along the diagonal.

 

Does it fold exactly in half and do the 2 sides overlap each other perfectly? 

 

 If not, then that diagonal is NOT an axis of symmetry.

 Oct 18, 2019
 #4
avatar+683 
+1

i figured it out,,, 

but that's an amazing way to do it too

thanks melody :))

Nirvana  Oct 18, 2019

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