Three equilateral triangles and three shared vertices. What’s the proportion blue : green?

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geometry puzzles to train your brain

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- Post author By Rik
- Post date September 22, 2022
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Three equilateral triangles and three shared vertices. What’s the proportion blue : green?

- Tags area, proportion, triangle

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- Post author By Rik
- Post date September 21, 2022
- No Comments on The fried egg

Two concentric circles and two tangents. What is the yellow fraction?

An equilateral triangle containing a right triangle and a line segment. What fraction is pink?

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- Post author By Rik
- Post date September 14, 2022
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A parallelogram is divided into several areas. What is the area X of the blue trapezium?

- Tags area, parallelogram, trapezium

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- Post author By Rik
- Post date September 9, 2022
- No Comments on The bell tolls

An equilateral triangle inscribed in a rectangle. What is its area X in terms of triangle areas A and B?

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- Post author By Rik
- Post date September 7, 2022
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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 29, 2022
- No Comments on The leftward lean

Two triangles form a quadrilateral. What’s the total orange area?

- Tags area, quadrilateral, triangle