Area of Rectangles
Counting unit squares to find area formula
Source: Khan Academy, https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License.
Source: Khan Academy, https://www.khanacademy.org/math/cc-third-grade-math/imp-geometry This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License.