A regular pentagon with two coloured triangles. What’s the proportion orange : blue?

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geometry puzzles

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- Post author By Rik
- Post date February 17, 2023
- No Comments on The orange pennant

A regular pentagon with two coloured triangles. What’s the proportion orange : blue?

- Tags area, pentagon, proportion, triangle

A regular pentagon and a circle through two of its vertices and its centre. What’s the angle α?

Two regular pentagons share a vertex. What is the proportion red : green?

- Tags length, pentagon, proportion

A regular pentagon with an extended side. What’s the angle α?

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- Post author By Rik
- Post date December 30, 2022
- No Comments on It’s all right

A regular pentagon with a diagonal and a right triangle. What’s the angle α?

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- Post author By Rik
- Post date December 2, 2022
- No Comments on A clear vision

A circle containing a regular pentagon and two equilateral triangles. All shown points are on the circle. What’s the angle α?

Two regular pentagons are placed side by side. What’s the proportion blue : green?

- Tags area, pentagon, proportion

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- Post author By Rik
- Post date May 19, 2022
- No Comments on The pentagon attack

Two regular pentagons and two diagonals. What’s the angle α?

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- Post author By Rik
- Post date February 14, 2022
- No Comments on The three day stubble

A regular pentagon and a square share two vertices. What’s the angle α?

Three regular pentagons and two extended sides. What fraction of the total area is red?