https://www.khanacademy.org/math/cc-fourth-grade-math/plane-figures/imp-angle-introduction/v/acute-right-and-obtuse-angles 2021-06-30T20:49:30Z Acute, right, & obtuse angles Acute angles measure less than 90 degrees.  Right angles measure 90 degrees.  Obtuse angles measure more than 90 degrees.  Learn about angles types and see examples of each. Sal Khan video https://cdn.kastatic.org/googleusercontent/0TrIIisE8BxVp_Bs5Co3G8RXtYcnmx9zu5pR2My5GUcj1JjSm5_G6kkQ4ZMUk0Ln1ry1Q5I7HXnYXTX1BGCdUOnJ Acute, right, & obtuse angles Acute angles measure less than 90 degrees.  Right angles measure 90 degrees.  Obtuse angles measure more than 90 degrees.  Learn about angles types and see examples of each. https://cdn.kastatic.org/ka-youtube-converted/ALhv3Rlydig.mp4/ALhv3Rlydig.mp4 332 Angles https://www.khanacademy.org/math/mh-math-class-4-new/x0aa85301e8a9ef71:fun-with-shapes/x0aa85301e8a9ef71:angles/e/acute-obtuse-and-right-angles 2025-05-27T13:36:31.647204727Z Acute, obtuse and right angles In this exercise , students identify acute, obtuse and right angles using the angle shape shown Devashish Phadnis exercise https://www.khanacademy.org/math/mh-math-class-4-new/x0aa85301e8a9ef71:fun-with-shapes/x0aa85301e8a9ef71:angles/e/angles-in-shapes-and-objects 2025-05-27T13:36:31.647204727Z Angles in shapes and objects In this exercise students find out angle types in different objects in real life Devashish Phadnis exercise