7th Grade - 3/24

Math Notes-March 24th Grade 7
Investigation 7
7.1 page 7 Finding diameter Finding circumference	is answeris is the length across the center of the circle you you can measure a quarter of the circumference with string and then multiply this number by 4 (because there are 4 total groups) dfjdj
relationship between diameter and circumference	If you plot this on a graph, you’ll see that circumference is about three times as much as the diameter. Mathematicians figured out that there was a pattern to this. It was slightly more than 3 times the diameter. They call it pi. Pi is approximately equal to 3.14 (the decimal actually continues infinitely because it is an irrational number but we round it to 3.14 to make it easier to work with).
Pi »3.14» 22» 7	3.14 or it can be expressed as the fraction 22 over 7
Homestudy	#’s 1-5 on page 76. Find all measurements except area. Use 3.14 for pi