A square containing a right isosceles and an equilateral triangle. What’s the angle α?

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geometry puzzles to train your brain

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- Post author By Rik
- Post date September 8, 2022
- No Comments on Under the volcano

A square containing a right isosceles and an equilateral triangle. What’s the angle α?

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- Post author By Rik
- Post date September 7, 2022
- No Comments on The Pisa experiment

Four squares and an altitude to the top vertex form a right yellow traingle. What is the proportion yellow : green?

- Tags area, proportion, square, triangle

Two squares, a diagonal and a line segment. What is red : blue : green?

- Tags area, proportion, square

A square with an inscribed right triangle. What fraction is yellow?

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- Post author By Rik
- Post date August 30, 2022
- No Comments on An equitable portion

A square, its diagonals and a right triangle. What fraction is green?

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- Post author By Rik
- Post date August 22, 2022
- No Comments on The green deal

Three squares, one of which has a side length of 2. What is the green area?

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- Post author By Rik
- Post date August 12, 2022
- 1 Comment on Le Petit Nicolas

Two parallel squares with four line segments connecting opposing vertices. Prove that they pass through a single point.

- Tags square

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- Post author By Rik
- Post date August 11, 2022
- 2 Comments on Emerging from water

Two squares and an extended side. What’s red : green : pink?

- Tags length, proportion, square

Four squares and two shared vertices. What fraction is blue?

Two squares and an extended side. What’s the angle α?