CK-12 Foundation
Deductive Reasoning: Lesson
It is elementary, my dear Watson. A segment in a playlist on geometry introduces the idea of deductive reasoning. The video goes over three rules that apply to deductive reasoning and conditional statements.
Curated OER
Circles: Radius, Diameter and Circumference
Fascinating discussion regarding the origin of Pi accompanies a detailed explanation of how to find the circumference of a circle. Since this is the first installment in a series on circles, the concept of circumference is separated into...