9 of 9 Items .... Source: Ed Southall

Problems, Questions, and Puzzles to spark discussion and argument in the maths classroom.

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.: [GEOM], [Ed Southall], [Geometry Snacks].

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What's the perimeter?



.: [MS Math], [Ed Southall], [Geometry Snacks].

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Two 3-4-5 triangles sit on straight line AB, as do 2 points that form a regular hexagon. What is the area of the pink shaded region?


.: [GEOM], [Ed Southall], [Geometry Snacks].

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.: [GEOM], [Ed Southall], [Geometry Snacks].

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Three regular shapes with unit length sides. What is the size of the pink angle?


.: [GEOM], [Ed Southall], [Geometry Snacks].

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What fraction of square ABCD is shaded?


.: [GEOM], [Ed Southall], [Geometry Snacks].

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.: [ALL], [Ed Southall], [Constructions].

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Two unit squares on the sides of an equilateral triangle. What is the height of the triangle?


.: [GEOM], [Ed Southall], [Geometry Snacks].

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An unexpectedly excellent question popped out of a very odd talk today:

If you take the date xx/yy/zz , how many true triangles can you make in the year 2021 with dimensions xx/yy/zz?

And how many of them are right triangles?


.: [GEOM], [Ed Southall], [How Many?].
that's it.