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  1. Khan Academy

    If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and …

  2. Perimeter of a square using variables (video) | Khan Academy

    Let's learn how to write the perimeter for any square in the language of mathematics using variables. Created by Aanand Srinivas.

  3. Free Math Worksheets - Khan Academy Blog

    Mar 15, 2021 · Area and perimeter; Volume and surface area; Pythagorean theorem; Transformations, congruence, and similarity; Pre-algebra. Arithmetic properties; Factors and …

  4. Basic Geometry - Khan Academy

    This Basic geometry and measurement course is a refresher of length, area, perimeter, volume, angle measure, and transformations of 2D and 3D figures. If you are learning the content for …

  5. Find perimeter by counting unit squares - Khan Academy

    The perimeter is the total number of units around the edges of a shape, but the area is the number of unit squares inside the shape. Example: for a soccer field, the perimeter is the …

  6. Khan Academy Districts

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  8. AI for Teachers - Khan Academy

    Practice finding perimeter by counting unit squares. We will start with rectangles and then try some irregular shapes.

  9. Find perimeter by counting unit squares - Khan Academy

    Practice finding perimeter by counting unit squares. We will start with rectangles and then try some irregular shapes.

  10. Khan Academy

    Si estás viendo este mensaje, significa que estamos teniendo problemas para cargar materiales externos en nuestro sitio. Si estás detrás de un filtro de páginas web, por favor asegúrate de …