Circles 11/27 M-2

Circles

Think-pair-share:

Circumference: distance around the circle

Area: the number of square units inside that circle

Diameter: distance across the circle through its center

Radius: distance from the center to an edge of the circle

Circumference Formulas Area Formula

C = 2 rA = r2 C = d

https://www.youtube.com/watch?v=YokKp3pwVFc

https://www.youtube.com/watch?v=hJJJmQojcLM

What is pi?

What is (pi)?

3.14159265358979323846...

the ratio of the circumference of a circle to the diameter. Or in other words, the circumference divided by the diameter.

cd =

Try these examples: 227

6283220000

355113

9024

C = 2 r A = r 2

Find the area and circumference of this clock.

C = 2 r A = r 2

Find the area and circumference of this eye ball.

HW: finish worksheet