AIM: What does it mean for two figures to be similar?
HW: ACE #5-6; p.17-18
Classwork: With the start of a new unit came new CMP3 textbooks. Students traded in their "Accentuate the Negative" books on rational numbers for "Stretching and Shrinking" books based on similarity. We investigated what it means for two figures to be similar (the same shape, but different size). We also determined that similar figures have corresponding sides and angles and used a variety of examples to identify them. Students were also introduced to scale factor, which is a number that gets multiplied by some quantity to get another quantity. We compared this idea to a copy machine and that if you type in 200%, you will make a copy that is twice as large as the original. Likewise, a 50% scale factor would produce an image that is half the size of the original. Lastly, we tackled the concept of congruence, or same shape an size.