Oct+18

Bell Ringer: Observations about circular protractor.

Outdoor lab- weather permitting

Notes in notebook- Degrees in a circle = 360 degrees

Degrees from N to S = 180 degrees

Degrees from N to E = 90 degrees

Degrees from E to W = 270-90= 180 degrees

Diameter of a circle- straight line through the center

Radius of circle (r) = diameter / 2

Area of Circle = pi r2

Circumference = 2 pi r or D pi

Diameter= Circumference / pi