For those who want a little more practice, here are some Skill Checks you can try. Each has QR codes that you can scan from a smart phone or ipad (the app is free; just search for QR scanner). The first scan will give you a video to watch to help review the concept. The second code can be scanned after you answer the questions to check your work. This is a great chance to see which concepts you need more help with. If you struggle with a concept, search below for a blog post to review.
click the picture below to watch a video![]() Rotations are the third type of transformation we have discussed. We can rotate (turn) an image in two directions, clockwise (CW) or counterclockwise (CCW). Think about the direction the hands on a clock move. That is clockwise. The opposite direction would be counterclockwise. A rotation involves turning an image about a fixed point called the center of rotation. The center of rotation for our purposes will be the origin, (0,0). To rotate an image, you must first know the direction (CW or CCW) and the degree of rotation (usually either 90, 180, or 270 degrees). The corresponding points will form an angle of the same measure as the degree of rotation when connected using the center of rotation. Because rotating a figure does not change the size or shape (in other words, the corresponding side lengths and angle measures are congruent), the figures would still be congruent. See the investigation below for practice! |
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