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Today we started to examine the idea of congruent figures. When two figures are congruent they have the same shape and same size. We can prove that two figures on the coordinate plane are congruent if we can create one of the images by translating, reflecting, or rotating the other figure. We already know that translating, reflecting, or rotating a figure does not change the figure's shape or size. So we can do more than one of these things to a figure and the figure will still have the same shape and size. To figure out what this sequence of transformations was, we have to be detectives using clues to solve a mystery. This is a little more complex than our previous transformation lessons, so there are many videos below to help you understand!
Today we learned about our 3rd transformation...rotations! A rotation is a turn, meaning we turn the figure around a fixed point, like pivoting on your toes. We took notes, which are below. Also, here are some videos (below) on rotations. :)
Today we learned about reflections! A reflection is a flip over a line of reflection. Check out the notes and videos below if you need some extra review. Today we began our geometry unit! The first topic in the geometry unit looks at congruence, and how we can determine that two figures are identical. Today's lesson focused on translations. A translation is a slide, which means that we only change a figure's location, not its size or shape. Completed examples from today's notes are below in the slideshow, and they are available in your Homework Helper book. Here are some bonus examples that we didn't do in class, just in case you need some extra help with the homework. |
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