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4-4 Congruence and Transformations Video 1

Added Nov 08, 2016 •

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hello to my geometry people good news I ate before making this video so hopefully you won't hear my gurgling again throughout the whole thing today we are starting on 4.4 congruence and Transformations so we're pretty much just talk about what conjectures are you can make about a figure reflected in two lines member conjectures is just what what ideas can you make what thoughts do you have about these figures alright so if you need to pause to continue to copy down the essential question please new cell otherwise I'm going to bomb going  alright your warm-up says plot and connect the points in the coordinate plane to make a polygon and then name the polygon so is his name the polygon means is it a triangle is it a pentagon is in a hexagon is it a a rectangle is it a parallelogram so you have to name it go ahead video here cuz the next screen you're going to see is with the answers here is the answers to the warm-up four ones obviously a triangle number to however I would accept a parallelogram parallelogram a quadrilateral I would not accept rectangle on you proved to me that those angles were all right angles using float or something like that which I'm sure you guys did not do so either parallelogram or quadrilateral is perfect for me we're going to go ahead and move on  oops identifying congruent figures to geometric figures are congruent if and only if there is a rigid motion or composition of rigid motion that map's one finger onto the other so if you guys could go ahead and under find this part of this  two little bit hard to do this all in one and then remember that rigid motion means same shape and same size Camp so composition of rigid motions just means that you did like a translation then a rotation or flexion than a rotation so just means that you did two things that did not change it shape for its size and congruent means equal so it is not surprising that change shape or size  positif you need to continue highlighting are you want to finish reading it or whatever if I'm going to go ahead and move is everyone says Identify any congruent figures in the coordinate plane and explain okay so take a minute play talk about it with your partners why would they be congruent why would they not be congruent so posit here and then I'll go over the answers in a second okay so hopefully you guys actually talked it over when your partner is hopefully you have some sort of an idea when I look here though I just start with the first picture I see and that would be  this picture right here and so if I were you I would have looked at that picture and looked at all the other triangles to see if there were any other ones that looked like it might be the same and when I do that see the set over here until they have to be congruent which means they have to have preserve a rigid motion and so me this one looks like it's reflected like they flipped over each other but you can also just say this one has two on both sides the other one measures to on both sides so triangle GHI is congruent to Triangle s Beauty set and then next you just say because save eyes Ang all right and then the next one I would just look at the next triangle I see that triangle I this triangle this one has a length of 3 that one has a length of 232 they are congruent so triangle out of EG is congruent to Triangle lkm  an order is important so I said FEG so I went with the thigh how to link the two first then to the line the side that had a length of 3 you have to do the same thing for the second triangle do the side with a length of 2 then to the length of three so order is important that I'm just going to do a little quotes that represent  the reason is the same insulin the last picture here that we have is  this song right here are pretty where  and these ones are congruent because they also have the same length in size so Square ABCD is congruent to square pqr and they all have a length of 2 so again because they are the same length  and size same size and shape  going to go ahead and stop this video here so finish coffee and if you need to otherwise hopefully you guys got them all right with your partners

Uploaded by Lauren Stouffer.

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4-4 Congruence and Transformations Video 1

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