https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-angles-between-lines/v/angles-formed-by-parallel-lines-and-transversals 2023-05-12T21:01:01.897246564Z Angles, parallel lines, & transversals Parallel lines are lines in the same plane that go in the same direction and never intersect. When a third line, called a transversal, crosses these parallel lines, it creates angles. Some angles are equal, like vertical angles (opposite angles) and corresponding angles (same position at each intersection). Sal Khan video https://cdn.kastatic.org/googleusercontent/Vz_NMEoL9pcokuLJEAFY_U-n9SIzbtc56vA_P8hGFXLXAZEIdmfteizOxfIHqBk4kThnx6aglnEoGdRMahNp4OyW3w Angles, parallel lines, & transversals Parallel lines are lines in the same plane that go in the same direction and never intersect. When a third line, called a transversal, crosses these parallel lines, it creates angles. Some angles are equal, like vertical angles (opposite angles) and corresponding angles (same position at each intersection). https://cdn.kastatic.org/ka-youtube-converted/H-E5rlpCVu4.mp4/H-E5rlpCVu4.mp4 427 Perpendicular and Parallel Lines https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-angles-between-lines/v/figuring-out-angles-between-transversal-and-parallel-lines 2023-05-12T21:01:01.897246564Z Missing angles with a transversal When a third line called a transversal crosses two parallel lines, we can find the measures of angles using properties like corresponding angles, vertical angles, and supplementary angles. If we know just one of the angle measurements, these properties help us find all the missing angle measurements. Sal Khan video https://cdn.kastatic.org/googleusercontent/Jc7Hc_hUwIAHvvJpv_xjYjVmNGH5TEE0q90O7tSCCMK6BQ1fOzUe2zl-KCs-2bpIZZ-87m_tAVueoL37Wiy8QB5SOw Missing angles with a transversal When a third line called a transversal crosses two parallel lines, we can find the measures of angles using properties like corresponding angles, vertical angles, and supplementary angles. If we know just one of the angle measurements, these properties help us find all the missing angle measurements. https://cdn.kastatic.org/ka-youtube-converted/2WjGD3LZEWo.mp4/2WjGD3LZEWo.mp4 136 Perpendicular and Parallel Lines https://www.khanacademy.org/math/revision-up-math-class-6/x362f281d7ea4c7a1:week-2-revision-up-math-class-6/x362f281d7ea4c7a1:perpendicular-and-parallel-lines-revision-up-class-6-math/e/revision-perpendicular-and-parallel-lines-up-math-class-6 2026-04-08T01:15:04.085520103Z Revision Perpendicular and Parallel lines Practice problems for revision of Perpendicular and Parallel lines. Satya Swaroop exercise