Hey there, time for MaTh! 4th grade focus this month, so link up any posts if you have them or want to make one : )
4.MD.C.5 and 4.MD.C.6 are all about geometric measurement with a focus on angles–knowing how to measure angles and make them.
For this activity I got out my handy Spiral Draw (Klutz)
After I drew one of the designs I decided to explore it.
I wondered how far apart each rotation was. I couldn’t find a protractor, but I did have a right angle. I know a right angle is 90 degrees, so I counted how many times there was a tip (rotation) in that angle. It looked like exactly 9, meaning it would be 10 degrees.
But then, I need to know if it is really 10 degrees each. I tried another design…also had 9 points in 90 degrees.
If it is ten degrees exactly there would be 36 tips or points around the whole circumference. Turns out there were only 35, so then I have the problem 360 divided by 35.
So, without a protractor we were able to figure out the angles for this circular scenario. A protractor comes in handy when drawing angles with a specific degree though.
Have fun with angles and try to apply them to everyday experiences… Can your students figure out how many degrees apart the minutes are in a clock face? Pick a time and find out how many degrees there are between the hour hand and minute hand.
Thanks for joining me and see you next week : )
