Right, i've been reading about how M*R =/= R*M but I can't get my head round it.
On one hand it has an isosceles triangle (i know in the post it comes off like a 90 degree triangle but I can't fix that) which is mirrored and then rotated, so from:
A
B C
it is mirrored and stays the same, then rotated and becomes:
B
C A
Fair enough, but then when it's rotated and mirrored the book says the following happens:
rotated
B
C A
mirrored
B
A C
I can't get why in the mirroring at the end the CA changes to AC, whereas in the first case it doesn't.
anyone can explain it to me? I'm not sure I understand mirroring in the same way the book describes it.
On one hand it has an isosceles triangle (i know in the post it comes off like a 90 degree triangle but I can't fix that) which is mirrored and then rotated, so from:
A
B C
it is mirrored and stays the same, then rotated and becomes:
B
C A
Fair enough, but then when it's rotated and mirrored the book says the following happens:
rotated
B
C A
mirrored
B
A C
I can't get why in the mirroring at the end the CA changes to AC, whereas in the first case it doesn't.
anyone can explain it to me? I'm not sure I understand mirroring in the same way the book describes it.