A regular hexagon and an equilateral triangle share a vertex. What is red : blue?
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The see-through triangle
Tag: proportion
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Go Orange
A regular hexagon, two diagonals and an orange equilateral triangle. What’s blue : orange : red?
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Pink parallels
A pink parallelogram with two extended sides. What’s α : β?
The red and green wedges subtend the same angle, there are two right angles, and the blue sides have the same length. What is the ratio of lengths of the green and red segments?
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Downhill skiing
Choose any point D on the side AB of an isosceles triangle ABC, then extend the side AC beyond C to a point F with |CF| = |DB|. Show that the segment DF is cut exactly in two by the third side BC—that the orange and red trails are equal.
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Half right
A right triangle with two angle bisectors. What is red : blue?
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The green diamond
Two equilateral triangles are placed side by side. The common (blue) side is extended. What is red : blue?
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The ball pit
Two rectangles contain 6 congruent circles. The common rectangle side passes through the top centre. What’s yellow : red?
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Centre of attraction
An equilateral triangle with two perpendiculars to a point that is at the same height as the triangle centre. What is red : yellow?
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Tumbler doll II
Three squares and a circle. The red point is a common intersection of two square sides and the circle. What is blue : green?