### Circles are EVERYWHERE, and wherever there are circles, there’s math to be done!

### Spark your math thinking!

- Set up your math mini spark recording page: #16 Discover Circles
- Read this circle fact page. Record 3-5 ideas on your recording page.
- Find circles in your environment and snap some pictures. Make a Pic Collage (or use another app of your choice). Add the finished project to your recording sheet.
- Get a ruler. Snap a picture of a circle that you have found with a ruler going through the center This is measuring the
of the circle. Calculate the*diameter*of the circle by taking pi (3.14) times diameter.**c****ircumference****C = πd**. Record your math and the answer on your recording page - Read the following steps to see how you can get to Pi!

**Step 1: **Measure the diameter of a circle. I used the top of my QT cup in the picture below. I measured the diameter as 11.5 cm.

**Step 2:** Measure the outside of the circle (circumference) with a string (I used a piece of making tape folded in half because I didn’t have a string handy).

**Step 3:** Measure the string. I measured the circumference of my QT lid as 36.5 cm.

**Step 4: **Divide the circumference by the diameter (36.5 divided by 11.5).

I got 3.17391304. Not too bad!

5. Do steps 1-4 with your own circle. Record all of the math on your recording page.

6. Share your math mini spark recording page with your teacher/EY coordinator.

My pi day is on the digit 67,195 of pi. My piday is the fourth in my group.

What I learned in Wonderopolis is that 22/7 is the closest simple fraction to pi

I learned on Wonderopolis that pi’s symbol is a Greek letter.

I learned that pi never ends it keeps on going

I learned 72 digits of Pi

My Pi day is 2,805