A triangle with two angular bisectors. What’s the proportion blue : red?
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The sandal
Tag: angle
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Sliding down II
A quarter circle and a square. What’s the angle α?
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Meeting halfway
Two squares and three line segments. What’s the angle α?
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A square deal
A regular hexagon and a square share a vertex. What’s the angle α?
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The balloon incident
A circle with a red and a green tangent. The two tangency points are shown. Prove that the blue and red line segments are parallel.
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The new normal
Two equilateral triangles are placed as shown. Their centres are connected as well as their intersection points. What’s the angle α?
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Getting stuck
A regular pentagon and a circle through two of its vertices and its centre. What’s the angle α?
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To the core
A non-isosceles triangle with a red cevian and three line segments to a point on the cevian. Prove that this point is the incentre of the triangle.
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The antenna
A regular pentagon with an extended side. What’s the angle α?
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Çetins circle
A square, a semicircle and six line segments. What’s the angle α?