A video [48 mins, 48 sec] explaining 21 different math concepts to help students prepare for the ACT including; circumference; averages; probability; multiplication counting principle; functions; circles; percentages; factoring; rules of...

The video lesson from Khan Academy provides practice questions for the SAT. Watch Sal work through a harder Circle theorems problem.

The video lesson from Khan Academy provides practice questions for the SAT. Watch Sal work through a basic Circle theorems problem.

26-30, area, circumference, pythagorean theorem.

Geometry video with a focus on area, circumference and volume.

In this lesson, students are shown how to measure a curved distance. It is 3 of 9 in the series titled "Measuring A Curved Distance."

In this lesson, students are shown how to measure a curved distance. It is 2 of 9 in the series titled "Measuring A Curved Distance."

This video explains circumference, radius and diameter in an appealing way for students to understand.