https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry/imp-area-formula-intuition/v/transitioning-from-counting-to-multiplying-to-find-area-3rd-grade-khan-academy 2021-07-07T20:19:25Z Transitioning from unit squares to area formula Lindsay finds the area of a rectangle both by counting unit squares and multiplying side lengths.  Lindsay Spears video https://cdn.kastatic.org/googleusercontent/0TcMAODNL5pHqeAqhsBwYzmo6XYyHkphibtUWYy4rg3HTA4BYrsKdKuo5yQlLqLYsBbb_UyhIGiQJ8mAh5GudWhX Transitioning from unit squares to area formula Lindsay finds the area of a rectangle both by counting unit squares and multiplying side lengths.  https://cdn.kastatic.org/ka-youtube-converted/mu3HHCdYYtY.mp4/mu3HHCdYYtY.mp4 202 Problemas con área de rectángulos y cuadrados https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry/imp-multiply-to-find-area/e/area-of-squares-and-rectangles 2025-09-13T00:00:42.547282073Z 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 Problemas con área de rectángulos y cuadrados 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 Problemas con área de rectángulos y cuadrados 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 https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry/imp-area-and-the-distributive-property/v/area-of-rectangles-and-the-distributive-property 2021-06-30T20:49:31Z Area and the distributive property Sal uses the distributive property to find area of rectangles. Sal Khan video https://cdn.kastatic.org/googleusercontent/sDB-vo9XwodflLHYjzIRkVIMdOma3fxtpS4WfbSHW_-2BkCSDA3APjFa25pfKmYWXJR9SLkw14cJf3F1yQ-GKWKh Area and the distributive property Sal uses the distributive property to find area of rectangles. https://cdn.kastatic.org/ka-youtube-converted/Q3wfb0CPhIY.mp4/Q3wfb0CPhIY.mp4 229 Problemas con área de rectángulos y cuadrados https://www.khanacademy.org/math/cc-fourth-grade-math/area-perimeter/imp-area-and-perimeter/v/width-from-perimeter 2021-07-02T09:35:28Z Area & perimeter word problem: dog pen Sal figures out the width of a dog pen. Sal Khan video https://cdn.kastatic.org/googleusercontent/ZN2gMk2z36sJJfWEvYHh3xLCn-uLmo8LSN6ntEcxOpmnvmt0ricgJ-WLQjk3TPpF4Q2tzhgbP2JtJLHPiih121Y Area & perimeter word problem: dog pen Sal figures out the width of a dog pen. https://cdn.kastatic.org/ka-youtube-converted/AIb5x7fmtvE.mp4/AIb5x7fmtvE.mp4 194 Problemas con área de rectángulos y cuadrados https://www.khanacademy.org/math/cc-third-grade-math/3rd-perimeter/imp-comparing-area-and-perimeter/e/area-and-perimeter-scenarios 2023-07-21T15:44:30.100514261Z Area and perimeter situations Determine if a situation represents area or perimeter. Lindsay exercise https://www.khanacademy.org/math/cc-fourth-grade-math/area-perimeter/imp-area-and-perimeter/v/comparing-area 2021-07-02T09:35:29Z Comparing areas word problem Sal compares the area of two posters using their side-lengths. Sal Khan video https://cdn.kastatic.org/googleusercontent/1J2BDbHdmSQAxMImhW74FsJMP2VcUmd90zKbIGF4Kp0SGkJjqzd1V3zuAX9-Z42cbUrP4kXZN94b5Y5XasF0arOs Comparing areas word problem Sal compares the area of two posters using their side-lengths. https://cdn.kastatic.org/ka-youtube-converted/D2Ks5SKU6GM.mp4/D2Ks5SKU6GM.mp4 141 Problemas con área de rectángulos y cuadrados https://www.khanacademy.org/math/cc-fourth-grade-math/area-perimeter/imp-area-and-perimeter/e/area-and-perimeter-of-rectangles-word-problems 2026-04-07T23:17:37.123726494Z Area & perimeter of rectangles word problems Find the missing side length of a rectangle when given its perimeter or area.  Compare perimeters and areas of rectangles. Lori Hodges exercise https://www.khanacademy.org/math/cc-fourth-grade-math/area-perimeter/imp-area-and-perimeter/e/area_of_squares_and_rectangles 2024-04-02T14:40:11.776966208Z Represent rectangle measurements Identify length, width, area, and perimeter on rectangles.  And identify equations that will help find unknown rectangle measures, like area and perimeter. Ben Eater exercise