Lesson WHAT IS area?

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What is area?


Area is a measure of size of two-dimensional shapes on a plane.


My lessons on the topic  Area  in this site are
    - Formulas for area of a triangle
    - Proof of the Heron's formula for the area of a triangle
    - One more proof of the Heron's formula for the area of a triangle
    - Proof of the formula for the area of a triangle via the radius of the inscribed circle
    - Proof of the formula for the radius of the circumscribed circle
    - Area of a parallelogram
    - Area of a trapezoid
    - Area of a quadrilateral
    - Area of a quadrilateral circumscribed about a circle  and
    - Area of a quadrilateral inscribed in a circle
under the topic  Area and surface area  of the section  Geometry,  and
    - Solved problems on area of triangles
    - Solved problems on area of right-angled triangles
    - Solved problems on area of regular triangles
    - Solved problems on the radius of inscribed circles and semicircles
    - Solved problems on the radius of a circumscribed circle
    - A Math circle level problem on area of a triangle
    - Solved problems on area of parallelograms
    - Solved problems on area of rhombis, rectangles and squares
    - Solved problems on area of trapezoids  and
    - Solved problems on area of quadrilaterals
under the topic  Geometry  of the section  Word problems.

For navigation over the lessons on  Area of Triangles  use this file/link  OVERVIEW of lesson on area of triangles.

To navigate over all topics/lessons of the Online Geometry Textbook use this file/link  GEOMETRY - YOUR ONLINE TEXTBOOK.

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