https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-reflections/v/reflecting-points 2023-05-12T21:01:01.897246564Z Reflecting points We can plot points after reflecting them across a line, like the x-axis or y-axis. Reflections create mirror images of points, keeping the same distance from the line. When we reflect across the y-axis, the image point is the same height, but has the opposite position from left to right.  video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Reflecting points We can plot points after reflecting them across a line, like the x-axis or y-axis. Reflections create mirror images of points, keeping the same distance from the line. When we reflect across the y-axis, the image point is the same height, but has the opposite position from left to right.  https://cdn.kastatic.org/ka-youtube-converted/F77xiSlCehI.mp4/F77xiSlCehI.mp4 225 Reflections https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-reflections/v/reflecting-shapes 2023-05-12T21:01:01.897246564Z Reflecting shapes Let's reflect a quadrilateral across the x-axis. To do this, we find new points (A', B', C', D') by keeping the same x-coordinates and changing the y-coordinates to their opposite signs. This creates a flipped image of the original quadrilateral. video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Reflecting shapes Let's reflect a quadrilateral across the x-axis. To do this, we find new points (A', B', C', D') by keeping the same x-coordinates and changing the y-coordinates to their opposite signs. This creates a flipped image of the original quadrilateral. https://cdn.kastatic.org/ka-youtube-converted/lfBDOQddTD0.mp4/lfBDOQddTD0.mp4 158 Reflections https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-reflections/a/reflecting-shapes 2022-05-10T22:02:00.85367701Z Reflecting shapes Learn how to find the image of a given reflection. article https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-reflections/e/reflections-1 2026-04-07T23:17:37.123726494Z Reflect shapes Given a figure and a definition of a reflection, manually draw the image. Tomer Gal exercise https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-reflections/v/determining-reflections 2023-05-12T21:01:01.897246564Z Determining reflections A line of reflection is an imaginary line that flips one shape onto another. We find this line by finding the halfway points between matching points on the source and image triangles. All of the halfway points are on the line. Once we find that line, it shows how one triangle reflects onto the other. video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Determining reflections A line of reflection is an imaginary line that flips one shape onto another. We find this line by finding the halfway points between matching points on the source and image triangles. All of the halfway points are on the line. Once we find that line, it shows how one triangle reflects onto the other. https://cdn.kastatic.org/ka-youtube-converted/435Ipnmp7bA.mp4/435Ipnmp7bA.mp4 100 Reflections https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-reflections/e/determine-reflections 2025-11-21T17:50:47.901900147Z Determine reflections Given a shape and its image under a horizontal or vertical reflection, determine the line of reflection. Tomer Gal exercise