We are going live with Sal Khan Friday at noon PT / 3 pm ET! ⏰ Join us for Daily Homeroom with Sal - be a part of our community and ask Sal anything. For more information visit: keeplearning.khanacademy.org Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. If you’d like to contribute, please visit: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=live&utm_campaign=schoolclosers ... https://www.youtube.com/watch?v=O0S_OIx95Ro Note: All Khan Academy content is available for free at (www.khanacademy.org)

Proof that the sum of the measures of the angles in a triangle are 180 Watch the next lesson: https://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/v/triangle-angle-example-1?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Missed the previous lesson? https://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/ang_intro/v/line-and-angle-proofs-exercise?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Geometry on Khan Academy: We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large--from math to architecture to biology to astronomy (and everything in between). Learning geometry is about more than just taking your medicine ("It's good for you!"), it's at the core of everything that exists--including you. Having said all that, some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. ... https://www.youtube.com/watch?v=6s1CI3uuhko Note: All Khan Academy content is available for free at (www.khanacademy.org)

Binary fission, budding, mitosis, fragmentation, parthenogenesis and sexual reproduction. View more lessons or practice this subject at https://www.khanacademy.org/science/high-school-biology/hs-reproduction-and-cell-division/hs-types-of-reproduction/v/asexual-and-sexual-reproduction?utm_source=youtube&utm_medium=desc&utm_campaign=highschoolbiology 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 ... https://www.youtube.com/watch?v=g59s153t_6Q Note: All Khan Academy content is available for free at (www.khanacademy.org)

U09_L1_T2_we2 Opposite of a given number ... https://www.youtube.com/watch?v=zsnkK43UtfY Note: All Khan Academy content is available for free at (www.khanacademy.org)