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

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geometry puzzles

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

Two triangles and an extended side. What’s blue : orange?

- Tags angle, length, proportion, triangle

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- Post author By Rik
- Post date March 10, 2023
- No Comments on The hawfinch II

A circle with two tangents. What’s red : blue in terms of α?

- Tags angle, circle, length, proportion

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- Post author By Rik
- Post date March 8, 2023
- No Comments on The odd balance

Two circles are tangent to two perpendicular lines and have their centres connected. Prove that the green triangle is right isosceles.

Three squares and three line segments. What’s the angle α?

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- Post author By Rik
- Post date February 28, 2023
- No Comments on The lorgnette

An ellipse, two circles centred in its focal points, a chord and a tangent. What is the angle α?

A triangle with a cevian. What’s α?

A triangle with two angular bisectors. What’s the proportion blue : red?

- Tags angle, length, proportion, triangle

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- Post author By Rik
- Post date February 16, 2023
- No Comments on Sliding down II

A quarter circle and a square. What’s the angle α?

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- Post author By Rik
- Post date February 14, 2023
- No Comments on Meeting halfway

Two squares and three line segments. What’s the angle α?