https://www.khanacademy.org/math/cc-fifth-grade-math/properties-of-shapes/imp-quadrilaterals-2/v/quadrilateral-overview 2022-11-16T04:22:43.7414897Z Intro to quadrilateral There are many different types of quadrilaterals. A quadrilateral is defined as a two-dimensional shape with four sides, four vertices, and four angles. There are two main types: concave and convex. There are also various subcategories of convex quadrilaterals, such as trapezoids, parallelograms, rectangles, rhombi, and squares. Sal Khan video https://cdn.kastatic.org/googleusercontent/y0z2Dx227KWvT4VD_hG_TqpMYbxEXxdTPRSOKVc6aeWVt99HQzi2PyCHYK-EJWubSGHfH7rO_qaoBpweufvY7mrJ Intro to quadrilateral There are many different types of quadrilaterals. A quadrilateral is defined as a two-dimensional shape with four sides, four vertices, and four angles. There are two main types: concave and convex. There are also various subcategories of convex quadrilaterals, such as trapezoids, parallelograms, rectangles, rhombi, and squares. https://cdn.kastatic.org/ka-youtube-converted/Ka82QC4QvGA.mp4/Ka82QC4QvGA.mp4 504 Quadrilaterals https://www.khanacademy.org/math/cc-third-grade-math/quadrilaterals-3rd/imp-quadrilaterals/e/identify-quadrilaterals 2025-01-03T18:38:20.998556364Z Identify quadrilaterals Identify squares, rectangles, and rhombuses. Lindsay exercise https://www.khanacademy.org/math/cc-fourth-grade-math/plane-figures/imp-classifying-geometric-shapes/v/quadrilateral-properties 2021-06-30T20:49:37Z Quadrilateral properties Learn about the properties of quadrilaterals, parallelograms, trapezoids, rhombuses, rectangles, and squares. Sal Khan video https://cdn.kastatic.org/googleusercontent/JGC4e5CKmDPc0EaGsoC76iS72j_U_G4PY5Pqha8QYVqeze74OxRmhuICMKdpz8HS_llastP2FKeGE1eDazyEHLI Quadrilateral properties Learn about the properties of quadrilaterals, parallelograms, trapezoids, rhombuses, rectangles, and squares. https://cdn.kastatic.org/ka-youtube-converted/5CeBlu260Rw.mp4/5CeBlu260Rw.mp4 307 Quadrilaterals https://www.khanacademy.org/math/cc-fifth-grade-math/properties-of-shapes/imp-quadrilaterals-2/v/quadrilateral-types-exercise 2023-07-17T20:04:18.610848495Z Quadrilateral types Learn to identify quadrilaterals such as kites, trapezoids, parallelograms, rhombuses, rectangles, and squares by side length, presence of parallel sides, and angle type. Sal Khan video https://cdn.kastatic.org/googleusercontent/HUjOvmPMa3weC4ohLEbNYrz2dEK6nSP4Uh1T5bWCrghuhebQwqwRbENk8-hpBp60exi1tPolvDkkOr1U_T96F3y5FQ Quadrilateral types Learn to identify quadrilaterals such as kites, trapezoids, parallelograms, rhombuses, rectangles, and squares by side length, presence of parallel sides, and angle type. https://cdn.kastatic.org/ka-youtube-converted/wPZIa3SjPF0.mp4/wPZIa3SjPF0.mp4 169 Quadrilaterals https://www.khanacademy.org/math/cc-third-grade-math/quadrilaterals-3rd/imp-quadrilaterals/e/categorize-quadrilaterals 2025-02-27T11:46:16.621461116Z Analyze quadrilaterals Classify and compare rectangles, rhombuses, and squares. Erin Kats exercise https://www.khanacademy.org/math/cc-fifth-grade-math/properties-of-shapes/imp-quadrilaterals-2/e/quadrilateral_types 2025-02-27T11:46:16.621461116Z Quadrilateral types Identify quadrilaterals based on pictures or attributes. Quadrilaterals included are parallelograms, rhombuses, rectangles, and squares. Christopher Wobbles Seymour exercise https://www.khanacademy.org/math/geometry-home/geometry-shapes/angles-with-polygons/v/sum-of-interior-angles-of-a-polygon 2023-04-19T21:01:17.089483175Z Sum of interior angles of a polygon To find the interior angle sum of a polygon, we can use a formula: interior angle sum = (n - 2) x 180°, where n is the number of sides. For example, a pentagon has 5 sides, so its interior angle sum is (5 - 2) x 180° = 3 x 180° = 540°. Sal Khan video https://cdn.kastatic.org/googleusercontent/Dy9dwu-r7REqsvHnPJFG9BZyZgxZhkCsmdatuLMVhinf3RDOohVKv5QYloc5nPaMFXRcHpX97XgtX1-5mr9LXQ4xFA Sum of interior angles of a polygon To find the interior angle sum of a polygon, we can use a formula: interior angle sum = (n - 2) x 180°, where n is the number of sides. For example, a pentagon has 5 sides, so its interior angle sum is (5 - 2) x 180° = 3 x 180° = 540°. https://cdn.kastatic.org/ka-youtube-converted/qG3HnRccrQU.mp4/qG3HnRccrQU.mp4 550 Quadrilaterals https://www.khanacademy.org/math/geometry-home/quadrilaterals-and-polygons/quadrilaterals/e/quadrilateral_angles 2026-03-24T23:41:07.080866137Z Quadrilateral angles Find missing angle measures in quadrilaterals. Igor Terzic exercise