A circle inside a quarter circle. The triangle connects the two tangency points and the top of the quarter circle. What’s the angle α?
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The tin foil hat
Tag: angle
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Lazy Friday
Four congruent squares plus another one. What is the angle α?
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Tympanum II
A regular pentagon with a diagonal. What is the top angle of the isosceles triangle?
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The pillbox
Three touching circles in a rectangle and a common tangent. What’s the angle?
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The tympanum
A regular pentagon with a diagonal and an extended side. What is the top angle of the isosceles triangle?
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The winged messenger
A semicircle and two quarter circles pass through the same point. What’s the angle α?
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The seventies tipi
An isosceles triangle with two inscribed congruent semicircles. What is the angle α?
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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 Chihuahua
A circle and a right triangle. What’s the angle α?