https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-rotations/v/points-after-rotation 2021-02-16T16:08:13Z Rotating shapes Sal is given a triangle on the coordinate plane and the definition of a rotation about the origin, and he manually draws the image of that rotation. video https://cdn.kastatic.org/googleusercontent/ryzpJhKhWrS1aIVhgEGBk4l1pSuU5cwCYGGk3g3Z_n65H4DZIhy6iKwT75LvrxuldQ4_i68sddB0kyK07XCJhwN3 Rotating shapes Sal is given a triangle on the coordinate plane and the definition of a rotation about the origin, and he manually draws the image of that rotation. https://cdn.kastatic.org/ka-youtube-converted/6nUMiJfHLSA.mp4/6nUMiJfHLSA.mp4 492 Transformation by rotation https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-rotations/a/rotating-shapes 2022-05-10T22:02:00.85367701Z Rotating shapes about the origin by multiples of 90° Learn how to draw the image of a given shape under a given rotation about the origin by any multiple of 90°. article https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-transformations-intro/a/intro-to-rotations 2022-06-13T22:23:00.945663613Z Rotations intro Learn what rotations are and how to perform them in our interactive widget. article https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-rotations/e/rotations-1 2026-04-07T23:36:17.218592739Z Rotate shapes Given a figure on the coordinate plane and the definition of a rotation about the origin, manually draw the image of that rotation. Tomer Gal exercise https://www.khanacademy.org/math/cc-eighth-grade-math/geometric-transformations/rotations-8th/e/rotate-points--basic- 2026-04-07T23:55:07.30621384Z Rotate points (basic) Given a point and a definition of a rotation, plot the rotation on a coordinate plane or identify the coordinates of the rotated point.  Rotations are about the origin and multiples of 90º. Lindsay exercise https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-rotations/v/defining-rotation-example 2023-05-12T21:01:01.897246564Z Determining rotations To see the angle of rotation, we draw lines from the center to the same point in the shape before and after the rotation. Counterclockwise rotations have positive angles, while clockwise rotations have negative angles. Then we estimate the angle. For example, 30 degrees is 1/3 of a right angle. video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Determining rotations To see the angle of rotation, we draw lines from the center to the same point in the shape before and after the rotation. Counterclockwise rotations have positive angles, while clockwise rotations have negative angles. Then we estimate the angle. For example, 30 degrees is 1/3 of a right angle. https://cdn.kastatic.org/ka-youtube-converted/6pH-7pciYU8.mp4/6pH-7pciYU8.mp4 177 Transformation by rotation https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-rotations/a/determining-rotations 2023-09-29T20:10:37.268517027Z Determining rotations Learn how to determine which rotation brings one given shape to another given shape. article https://www.khanacademy.org/math/cc-eighth-grade-math/geometric-transformations/rotations-8th/e/determine-rotations--basic- 2023-12-11T22:13:00.981327266Z Determine rotations (basic) Given a figure on the coordinate plane and a center of a rotation, find the angle for the rotation that maps one figure to the other.  Rotations are around the origin and a multiple of 90º. Lindsay exercise https://www.khanacademy.org/math/cc-eighth-grade-math/geometric-transformations/rotations-8th/a/rotations-review 2023-12-11T22:13:00.981327266Z Rotations review Review the basics of rotations, and then perform some rotations. article