Three triangles are glued together. The green ones are based on a common line. What’s the angle α?
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Two brotherly pines
Tag: angle
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It’s all right
A regular pentagon with a diagonal and a right triangle. What’s the angle α?
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The glass splinter
A triangle of which two sides and one angle are given. What’s the angle α?
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The seesaw
A regular hexagon with three diagonals and two line segments at right angles. What is the proportion green : yellow : blue : orange?
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The consonant squares
Four squares and a rectangle. What’s the angle α?
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The forward lean
A square with a diagonal and an isosceles triangle. What fraction is brown?
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The domino effect
Two overlapping congruent rectangles. What’s the angle α?
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A clear vision
A circle containing a regular pentagon and two equilateral triangles. All shown points are on the circle. What’s the angle α?
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The double flag
Three tangent circles and a common tangent. The three tangency points are shown. What is α + β?
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The door stop
A triangle with a cevian. What is α?