Circles

We learned some new words today in 1L. We know that the circumference is all the way around the circle. We know the diameter goes across the middle of the circle from one edge to the other, and the radius goes from the center to the outside.

We traced many round containers and objects, and measured the diameters and circumferences.

A good strategy for measuring around an object is to use a measuring tape, or a piece of string.

We put all of our information into a chart, and then made a graph from our data. We noticed that our graph had all of the points in a straight line. We can use the trends that we see to help us estimate the circumference of a circle if we know the radius.