A point P is selected anywhere inside an equilateral triangle. What can you say about the sum of the perpendicular distances from P to the sides of the triangle? Can you prove your conjecture?
What is the area of the quadrilateral APOQ? Working on the building blocks will give you some insights that may help you to work it out.
Six circular discs are packed in different-shaped boxes so that the discs touch their neighbours and the sides of the box. Can you put the boxes in order according to the areas of their bases?
The diagonals of a trapezium divide it into four parts.
Can you create a trapezium where two of those parts are equal in area?
Can you create a trapezium where three of those parts are equal in area?
Can you create a trapezium where all four parts are equal in area?