tag:blogger.com,1999:blog-812794395259173668.post638476279958898901..comments2024-01-16T20:55:12.331-05:00Comments on Drawing On Math: Circle GraphsTina Cardonehttp://www.blogger.com/profile/00549943329133396794noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-812794395259173668.post-31905755459671339152014-05-01T21:39:22.080-04:002014-05-01T21:39:22.080-04:00Truth - I have no idea why we ever talk about arc ...Truth - I have no idea why we ever talk about arc length in degrees, it makes little sense to me. That's probably why I skipped to just telling them. Adjustment made. <br /><br />In step 9 I asked them to find the arc length in centimeters. I wasn't sure how long this would take so I moved it to the end. I also wanted everything to fit on one page so I squished what should be 7b and 8b together. Maybe I'll change it to 7b: find the measure of ONE arc in centimeters. Then they don't spend forever finding all the arcs but have the experience. <br /><br />Thanks for the feedback!Tina Cardonehttps://www.blogger.com/profile/00549943329133396794noreply@blogger.comtag:blogger.com,1999:blog-812794395259173668.post-28234132413207827632014-05-01T21:35:40.242-04:002014-05-01T21:35:40.242-04:00They didn't really think to use proportions on...They didn't really think to use proportions on their own, but that's okay. Sometimes teasing the idea out of them (individually or as a class) is an important part of the process. If you think it's good then it's good :)Tina Cardonehttps://www.blogger.com/profile/00549943329133396794noreply@blogger.comtag:blogger.com,1999:blog-812794395259173668.post-80650342391889086032014-04-30T10:55:33.121-04:002014-04-30T10:55:33.121-04:00I also like the vagueness of step 4, along with th...I also like the vagueness of step 4, along with the big hint in step 5 that the central angle has something to do with it.<br /><br />I see two opportunities that could be exploited here:<br />In step 6, you just tell them the degree measure of the arc is the same as the central angle. It might be more fruitful to ask what they /think/ the degree measure of the arc should be, and justify why they think that.<br />You mention arc length in step 6 and have them calculate circumference in step 7. Depending on your learning goals, you might say something like 7b) Using all the information you have so far, what do you think is the length of each arc in centimeters?Katehttps://www.blogger.com/profile/14229054922453438248noreply@blogger.comtag:blogger.com,1999:blog-812794395259173668.post-78432119669100443742014-04-29T21:18:26.427-04:002014-04-29T21:18:26.427-04:00Maybe I'm under-thinking things, but given the...Maybe I'm under-thinking things, but given the variety of approaches you've seen your students take, it strikes me that vague is kinda good here. I mean they find some method to use, you give 'em a little space to write down percents, proportions, whatevs and then they're good to go?Anonymousnoreply@blogger.com