Category: Kids (middle school and up)

GeoGebra app Feb 2024

• khoitsma
• General, Kids (middle school and up), Mathematics
• 0 Comments

Screenshot

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Reflection on Billiards and Math Feb 2024

• khoitsma
• General, Kids (middle school and up), Mathematics
• 0 Comments

This inscribed triangle is a periodic billiard trajectory called the Fagnano orbit, named for Giovanni Fagnano, who in 1775 showed that this triangle has the smallest perimeter of all inscribed triangles.

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What is the Day of the Week? Jan 2024

• khoitsma
• Algorithms, editor's pick, General, Kids (middle school and up), Mathematics, Mental Math
• 0 Comments

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Engineering Math Nov 2023

• khoitsma
• editor's pick, Engineering, Kids (middle school and up), Mathematics, Mental Math
• 0 Comments

“Often while working, an arithmetical answer is needed — exact is sometimes required, approximate is often acceptable — maybe the basis of a decision or a path forward is based on a few quick calculations, with more rigorous calculations to follow

Multiply by 11 (or 12). Just write down the answer !
Pascal’s Triangle
Aliquot Parts

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Buckminster would be proud Nov 2022

• khoitsma
• Concept, editor's pick, General, Kids (middle school and up)
• 0 Comments

… maybe

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Rechnen, Multiplizieren und Addieren Nov 2022

• khoitsma
• Kids (middle school and up), Mathematics, Mental Math
• 0 Comments

Sum the numbers — let me count the ways

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