Two squares share a vertex. Two other vertices are 4 units apart. A third green square has the centres as opposite vertices. What is its area?
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The common ground
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Rising bread
A regular hexagon with a diagonal and a circular arc centred in a side midpoint. What fraction is yellow?
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The antenna
A regular pentagon with an extended side. What’s the angle α?
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The double bottom
A regular hexagon and a square share a vertex. What is the area proportion square : hexagon?
A square contains a yellow right triangle with an area of 11. What is the square’s area?
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Çetins circle
A square, a semicircle and six line segments. What’s the angle α?
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The erratic spider
A square with several line segments. Prove that the blue ones are parallel.
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Black and blue
A square with an extended side inside another square. What fraction of the latter is blue?
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Mother and child
Two circles, two radii and three chords. What is the length of radius x in terms of a, b and c?
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Almost sunk
A square contains a right triangle. What fraction is red?