Khan Academy 308d ago

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/math/geometry-tx/x790e3ac3e338c450:intro-to-logic/x790e3ac3e338c450:postulates-conjectures-and-theorems/v/how-sure-are-we In geometry, science, and in many areas of life, we have vocabulary to describe how sure we are. Conjecture: A statement that we believe is always true because we have seen many examples of it and no counterexamples. Postulate: A statement that we believe is always true because people generally agree it is true, but without proof. Theorem: A statement that we believe is always true because we prove it by a series of other definitions, postulates, and theorems. Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc