A square is divided in two quadrilaterals of given area. What fraction of the square’s perimeter is red?
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The green field
Tag: area
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Ice cube
A rectangle and a square. What is the proportion purple : blue?
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The hourglass
A rectangle with two crossing line segments. What’s the minimal shaded fraction?
Four quarter circles of radius 1, each containing a square. What is the blue area?
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Below the tree line
A triangle is split in two. What is the area of the green quadrilateral in terms of lengths a and b?
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The ramp
A right triangle is split in two. What is the maximum yellow fraction?
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The headphones
A unit square, a semicircle, a right triangle and an isosceles triangle. What is the total purple area?
Two similar rectangles. If the small one has area 4 what is the area of the large rectangle?
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Giro d’Italia
A square with the origin halfway one of its sides. The coordinates of two vertices are given. What is the square’s area?
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The Eye of Horus
A semicircle containing two equilateral triangles containing a circle. What fraction is blue?