Express the circle area in terms of the isosceles triangle area A and its side length a.

Author: Marshall W. Buck

geometry puzzles

Express the circle area in terms of the isosceles triangle area A and its side length a.

Author: Marshall W. Buck

Two intersecting circles with two inscribed triangles and two line segments through an intersection point. Prove that the triangles are similar.

Co-author: Marshall W. Buck.

Two intersecting circles inside a rectangle and a line segment connecting vertex, intersection point and tangency point. What’s the angle α?

An equilateral triangle and three line segments. What’s the angle α?

Categories

- Post author By Rik
- Post date April 24, 2023
- No Comments on The douche cabine

A square containing three smaller squares and a quarter circle. What fraction is orange?

Categories

- Post author By Rik
- Post date April 17, 2023
- No Comments on The quarter trampoline

A quarter circle with two chords of given length. What is the area of the orange quadrilateral?

- Tags area, circle, length, quadrilateral

Categories

- Post author By Rik
- Post date April 13, 2023
- No Comments on Outside the hive

A regular hexagon and two squares. What’s the angle α?

What fraction of the regular hexagon is yellow?

A square and an equilateral triangle inside a right triangle. Prove that the three red vertices are collinear.

Three congruent squares share three vertices. What’s the angle α?