What is the ratio of the blue and yellow lines?
Two squares sharing a vertex. Two vertices are connected by a line segment. What is yellow : green?
What is the area of the coloured figure? Can you determine the area without counting the number of squares in each different-coloured shape?
A square with two right angles. What fraction is yellow?
A unit square and a point on the inscribed circle. What is a2+b2+c2+d2?
Three congruent squares share two vertices while the upper sides coincide. What’s red : blue?
A square, two orthogonal axes and two angles. What’s the proportion α : β?
Four Pac-Men eat the corners of a square while four others stand guard. What fraction of the square is eaten?
A square with two line segments. What fraction is blue?
Three squares and a circle. Prove that the red point is on two squares and the circle.