A circle with four chords. Two chord lengths are given. What is the circle area?
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Spider-Man
Tag: area
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The sailing boat
Three congruent right triangles. What fraction is shaded?
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Downsizing
Two squares share a vertex. The small square has an area of 20 and the triangle has area 1. What is the area of the large square?
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The three rights
A trapezium containing three right angles is split in two. What is the proportion of the areas yellow : blue?
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The color fan
Two congruent rectangles share a vertex. Given that the three coloured areas are equal, what is the width x?
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The right angle
Two triangles inside a quarter circle. What is their area proportion?
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The triangle quartet
A square is divided into four triangles. The red area equals the blue area. What is the angle α?
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The corner stone
Four squares inside another square. What fraction is yellow?
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La Flèche Wallonne
A triangle is divided in four. What is the black area?
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The navel orange
Two quarter circles and a semicircle inside a circle. What fraction of the circle is shaded by the semicircle?