A square contains two triangles. What fraction of the square do they cover?
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The radio telescope
Tag: area
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The warning triangle
An equilateral triangle contains three congruent rectangles. Two distances on its base are given. What fraction is white?
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The baby brother
Three small right triangles embedded in a large right triangle. Two of the areas are given. What’s the area of the smallest one?
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The tumbler doll
A circle within an equilateral triangle within a circle. What fraction is shaded?
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The folded triangle
An equilateral triangle is folded with its left side at right angles with the base. What fraction of the total triangle is shaded?
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The circus tent
A regular octagon is coloured as shown. What fraction of its area is red?
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The windshield wipers
A square and two rectangles, connected by two circular arcs, form a square. What is the proportion of the orange to the green area?
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Velocipede II
Two circles of area π and 9π respectively are contained in a parallelogram. What’s its area?
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The square peg
A square is fitted into an equilateral triangle as shown. What fraction is shaded?
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The velocipede
Two circles are embedded in a frame of size 9 x 8. What is their total area?