#GeometryPuzzles
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mathforge.org
Sunday night seems the right time to post a gallery of (I hope!) every one of Catriona's geometry puzzles.

notes.mathforge.org/notes/publis...

Give it a moment to load ... there's a *lot* of them!

#GeometryPuzzles #UKMathsChat #mathsky
Puzzle Gallery in Notes
notes.mathforge.org
November 16, 2025 at 6:24 PM
xehmalstwitter.bsky.social
Easy math

https://x.com/GeometryPuzzles/status/1986922600854163536
Image
November 8, 2025 at 2:48 AM
mathforge.org
Sometimes I struggle to name @catrionaagg.bsky.social 's puzzles.

Sometimes I don't.

notes.mathforge.org/notes/publis...

#mathsky #geometrypuzzles
four houses in a semi-circle in Notes
notes.mathforge.org
August 4, 2025 at 2:47 PM
xehmalstwitter.bsky.social
Simplifying radicals #algebra

https://x.com/GeometryPuzzles/status/1986496478802743660
Image
November 8, 2025 at 3:03 AM
mathforge.org
I have a query about one of @catrionaagg.bsky.social 's puzzles. The goal is the area of the red quarter circle.

I have a solution that *doesn't* use the semi-circle. Am I missing something, or is that semi-circle irrelevant?

#geometrypuzzles

notes.mathforge.org/notes/publis...
A right angled triangle with a filled red quarter circle with centre at the right angle and which is tangential to the hypotenuse. The hypotenuse is divided into three equal parts, each labelled "2". The point of tangency of the quarter circle is at a division point, with one part above and two parts below. Also in the diagram is a semi-circle which has centre on one of the non-hypotenuse sides and which meets tangentially the hypotenuse at the other division point.
August 5, 2025 at 5:48 PM
xehmalstwitter.bsky.social
Easy math

https://x.com/GeometryPuzzles/status/1986497769750839636
Image
November 8, 2025 at 2:47 AM
mathforge.org
For some reason, linking directly to an image doesn't fetch a preview of that image. That's annoying. Anyway, here's the image for that puzzle.

#mathsky #geometrypuzzles
One of Catriona Agg's puzzles. It consists of four equal-sized squares aligned horizontally with four equilateral triangles on top - one triangle per square - and of the same side length as the squares. These are contained within a semi-circle so that the squares sit on the base of the semi-circle and the arc just touches the tops of the outer two equilateral triangles. The diameter of the semi-circle has length 4.
August 4, 2025 at 6:38 PM
rplsdotcom.bsky.social
ICYMI: #GeometryPuzzles #MathChallenges #PuzzleSolving #YouTubeLearning #Education
More Geometry puzzles
I found this site on YouTube and thought it might be interesting to some of you. Some great puzzles and he walks you through the solutions with explanations.
dlvr.it
June 27, 2025 at 11:32 AM