These puzzles appeared in Issue 01 of the magazine.
#2 – Circles
Pictured are: a quarter circle with radius 2r, and two semi circles with radius r.
Prove that the pink area is equal to the green area.
#104 – Two Triangles
In the diagram, the three sides of a triangle have been split into thirds, then the lines have been added.
What is the area of the smaller shaded triangle as a fraction of the area of the large triangle?
The answers to these puzzles are available here.
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Chalkdust Book of the Year 2022We announce the shortlist of our favourite maths-themed books of last year
Come to the issue 16 launch partyCelebrate the latest issue with us in London on 28 November