Three tangent circles and a common tangent. The three tangency points are shown. What is α + β?
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Solution
α + β is 90°.
![](https://mirangu.com/wp-content/uploads/2022/11/DoubleFlagSolution.jpg)
One might refer to The lunar twins to check that C is indeed the centre of the large circle.
Poem
The double flag
Blue
And yellow
For freedom
Blue like the sky
Yellow like the sun
![](https://mirangu.com/wp-content/uploads/2022/11/DoubleFlagBella.jpg)