Categories
Intermediate

The balance sheet

A unit square and a parallelogram. What’s the area of the latter?

Categories
Beginner

The parquet floor

A unit rhombus is surrounded by four congruent parallelograms. All five quadrilaterals have equal area. What are the parallelogram sides x and y?

Categories
Intermediate

Velocipede II

Two circles of area π and 9π respectively are contained in a parallelogram. What’s its area?