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  2. Area - Wikipedia

    en.wikipedia.org/wiki/Area

    Area is the measure of a region 's size on a surface. The area of a plane region or plane area refers to the area of a shape or planar lamina, while surface area refers to the area of an open surface or the boundary of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to ...

  3. Area of a circle - Wikipedia

    en.wikipedia.org/wiki/Area_of_a_circle

    The area of a regular polygon is half its perimeter multiplied by the distance from its center to its sides, and because the sequence tends to a circle, the corresponding formula–that the area is half the circumference times the radius–namely, A = ⁠12⁠ × 2πr × r, holds for a circle.

  4. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    For example, an area of study is often qualified as mathematics as soon as one can prove theorems—assertions whose validity relies on a proof, that is, a purely-logical deduction. [ d ] [ 176 ] [ failed verification ]

  5. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    In accounting, a worksheet is, or was, a sheet of ruled paper with rows and columns on which an accountant could record information or perform calculations. These are often called columnar pads, and typically green-tinted. In computing, spreadsheet software presents, on a computer monitor, a user interface that resembles one or more paper ...

  6. Standards-based assessment - Wikipedia

    en.wikipedia.org/wiki/Standards-based_assessment

    The purpose of standards-based assessment [ 5 ] is to connect evidence of learning to learning outcomes (the standards). When standards are explicit and clear, the learner becomes aware of their achievement with reference to the standards, and the teacher may use assessment data to give meaningful feedback to students about this progress.

  7. Mathnasium - Wikipedia

    en.wikipedia.org/wiki/Mathnasium

    Mathnasium was founded in 2002 by Larry Martinek, David Ullendorff, and Peter Markovitz. The first center opened in Westwood, Los Angeles, California, and continues to be one of a small number of centers owned by Mathnasium, LLC. The company began franchising in 2003. In 2019, the company has more than 1,000 centers on five continents.

  8. Multiplication - Wikipedia

    en.wikipedia.org/wiki/Multiplication

    Animation for the multiplication 2 × 3 = 6 4 × 5 = 20. The large rectangle is made up of 20 squares, each 1 unit by 1 unit. The large rectangle is made up of 20 squares, each 1 unit by 1 unit. Area of a cloth 4.5m × 2.5m = 11.25m 2 ; 4 ⁠ 1 / 2 ⁠ × 2 ⁠ 1 / 2 ⁠ = 11 ⁠ 1 / 4 ⁠

  9. List of U.S. states and territories by area - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._states_and...

    The second largest state, Texas, has only 40% of the total area of the largest state, Alaska. Rhode Island is the smallest state by total area and land area. San Bernardino County is the largest county in the contiguous U.S. and is larger than each of the nine smallest states; it is larger than the four smallest states combined.

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