Two squares and an extended side. What’s the angle α?
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The guylines
Tag: angle
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The inner circle
A triangle with its incircle. A line segment through two tangency points and one through the incentre. What’s the angle α?
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Know all angles
A triangle with its circumcircle and circumcentre. What’s α : β?
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We are equal
A quadrilateral with its diagonals. What’s the angle α?
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A nice percentage
An orange square and a blue rectangle with two congruent inscribed circles. What is the angle α?
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Fair and square
Two squares of which three vertices form an isosceles triangle. What is the angle α?
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The golf ball
A circle and a triangle with two sides tangent to the circle and a side connecting the tangency points. The line segment of the circle centre to the triangle apex is shown. Prove that α = β.
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Égalité
A square with its diagonal and a circle. If red is equal to blue, what’s the angle α?
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The bungee cords
Three squares and two line segments. What’s the angle α?
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The pentagon attack
Two regular pentagons and two diagonals. What’s the angle α?