A semicircle is inscribed in a rectangle. What is the minimal covered fraction?
Two overlapping congruent right triangles. If |AB|=15 and |BC|=7, what is the total area?
An isosceles triangle with two altitudes dividing each other in segments of length 4 and 5. What is the total triangle area?
A circle containing three squares. What fraction is coloured?
Two isosceles triangles and a right angle. What is the proportion green : gold?
A regular octagon containing a blue hexagon. All line segments have equal length. What fraction is blue?
A regular hexagon and three squares. What is the proportion yellow : brown?
A right triangle with its inscribed circle. Two cevians are drawn through the circle centre. What is the circle area in terms of triangle areas A and B?
An equilateral triangle with an altitude. Two of its sides form the radii of the circular sector. What fraction of the area is covered by the red circle?
Four squares and five shared vertices. If the orange area is 4, what is the green area?