Calculate with circumferences and areas of circles. SPI 0606.4.4

Links verified on 7/15/2014

1. Animated Proof of the Pythagorean Theorem
2. Calculating Areas - five multiple choice questions
3. Calculating the Circumference of a Circle - instruction, practice and a quiz (they call it a game at AAA Math)
4. Circle, Sphere and Cylinder Calculator - input a number, state if the number is diameter, radius, or circumference and the other numbers are calculated
5. Eratosthenes: Measurement of the Earth's Circumference - scroll down past the ad to see how the circumference of the earth was measured around 240 BC
6. Finding the Area of a Circle - instruction, practice and a quiz (they call it a game at AAA Math)
7. The Geometry of Circles - illustrated definitions from Cool Math
8. Lesson on Circumference of a Circle - examples and five practice exercises
9. Measuring Around - find circumference - five multiple choice questions
10. The Pythagorean Theorem, Distance Formula and Intro to Trigonometry - other practice activities