Proof Without Words: If x >0, x + 1/x >=2

A picture is worth a thousand words, even in mathematics. Most of the time, complicated algebraic statements can be shown using geometric representations. One example is the sum of which when added equals 1. In this post, we show another geometric proof without words. Proof without words is not a proof per se but rather […]
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Why the Area of a Rhombus is Half the Product of its Diagonals

A rhombus is a parallelogram with four congruent sides. Since it is a parallelogram, it has also all the properties of a parallelogram. One of these properties is that the diagonals bisect each other. That is, they divide each other into two equal parts. Another property of a rhombus is that the diagonals are perpendicular. So, summarizing all […]
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Explore Solid Nets Apps and Print Models

Are you looking for solid nets resources, printable worksheets, or interactive apps? Check out the five websites below. These sites contains resources about solids, their properties, and their nets. Printable nets are also available. Annenberg Media has an interactive page on Platonic solids, prisms, and pyramids. It allows users to rotate 3d shapes and see […]
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