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What is the dotted line behind the mirror represent?
mirror line
What does reflective symmetry mean?
Reflective symmetry is when you have a shape (a letter for example, even though they are weird shapes) and you can put a line through it called a mirror line. On the mirror line you put a mirror on it and you can see a half of the shape reflected to make the complete shape.You must be able to do this on both sides of the shape otherwise it won't have reflective symmetry.Take the letter E for example. If you put a line straight through the middle of it horizontally it would be a mirror line.
What is the imaginary mirror in line symmetry?
The LINE of symmetry
What does the transformation y equals -x mean?
Assuming you're talking about transforming graphs, you mirror the graph along the line y = -x.
How do you figure out lines of symmetry?
Think of the line of symmetry as a mirror (indeed try using a small hand rectangular hand mirror). a symmetry either side of a line is like a reflection of one side in the mirror.
