There are 3 types of reflections that you need to know about in regards to the order pair rules. Next, a point and its image are equidistant from the line of reflection so again let's go back to our little example here and if I picked this vertex c and if I drew a perpendicular from vertex c to the line of reflection, that's going to be the same distance as its image which is c prime, so the distance from c prime to that line of reflection will be congruent, so that's how you know how far to reflect and in what direction over the line that is given to you.Īnd the last thing is you can kind of consider this a flip that will be the non mathematical way of describing a reflection. Now, if we go over to our image, if I start with a the next vertex is b not d, so that's what we mean when we say the image has opposite orientations because when you reflect it you're going to have a different order of vertices that's going to be important when you get to Chemistry. Here I have an original and I reflected this quadrilateral over this dotted little line onto the other side, so if we were to go in clockwise direction, after a I would have d after d I would have vertex c after vertex c I would have vertex b and after vertex b I would have vertex a. Well that's a little difficult to understand so let's take a look at two different pictures. Secondly its image has opposite orientations. Now, what is a reflection? Well, reflection is an isometry which means it's rigid transformation which means its shapes are congruent after the reflection. When we're talking about transformations, there are 4 different types one of which is a reflection.
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