https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry/imp-area-formula-intuition/v/rectangle-area-as-product-of-dimensions-same-as-counting-unit-squares 2021-07-07T20:19:26Z Counting unit squares to find area formula Sal uses unit squares to see why multiplying side-lengths can also find the area of rectangles.    Sal Khan video https://cdn.kastatic.org/googleusercontent/stlR2hLpfqUfhlaLA1rKy8H9zxDvxEGD6edqlv1x1mvDZt_TDdE-iide8P6i7NGR_cnNQdkRDwsjUpENXZzeGTc Counting unit squares to find area formula Sal uses unit squares to see why multiplying side-lengths can also find the area of rectangles.    https://cdn.kastatic.org/ka-youtube-converted/DRg2VCo8lP0.mp4/DRg2VCo8lP0.mp4 320 Multiply to find area https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry/imp-multiply-to-find-area/e/area-of-squares-and-rectangles 2026-06-18T15:40:05.331792771Z Area of rectangles Find area of rectangles and squares by multiplying side lengths. Lindsay exercise https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry/imp-multiply-to-find-area/v/finding-missing-side-when-given-area-math-3rd-grade-khan-academy 2021-07-07T20:19:25Z Finding missing side when given area Lindsay finds the missing side length on a rectangle when given the area of the rectangle.  Lindsay Spears video https://cdn.kastatic.org/googleusercontent/4UWiKYtz-XuI6D4Frqz2ieJ0yLETguWV59xwm8xc3ts4PeHKRNflaTcs04S-sjB0PXwfpIvkcj0Dhhz00vaLkPA Finding missing side when given area Lindsay finds the missing side length on a rectangle when given the area of the rectangle.  https://cdn.kastatic.org/ka-youtube-converted/_JdgDBzQ0Us.mp4/_JdgDBzQ0Us.mp4 184 Multiply to find area https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry/imp-multiply-to-find-area/e/find-a-missing-side-length-when-given-area-of-a-rectangle 2024-09-14T11:44:41.070959017Z Find a missing side length when given area Practice finding a missing side length on a rectangle when given the other side length and the area. Lindsay exercise https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry/imp-multiply-to-find-area/v/comparing-areas-of-plots-of-land 2020-09-16T18:09:53Z Comparing areas of plots of land Sal finds area of two rectangles to solve a word problem. Sal Khan video https://cdn.kastatic.org/googleusercontent/F20RAFOBCqYOgS1bKEAGZSeqbBOabpcAzSWGsSv5bYdDTBk4J9xb9mXzcQ838DJN5gSvb6kPzfkASAJD8cptdcY Comparing areas of plots of land Sal finds area of two rectangles to solve a word problem. https://cdn.kastatic.org/ka-youtube-converted/ArvnBba_ogI.mp4/ArvnBba_ogI.mp4 166 Multiply to find area https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry/imp-multiply-to-find-area/e/comparing-areas-by-multiplying 2022-07-27T14:52:42.217615992Z Compare areas by multiplying Compare the areas of rectangles represented in images or contexts. Lindsay Spears exercise https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry/imp-multiply-to-find-area/a/area-rectangles-review 2021-06-30T20:49:37Z Area of rectangles review Review the basics of area of rectangles and try some practice problems. article