Two squares share a vertex. One line segment connects their centres, another two vertices. What is the length proportion blue : red?
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The proportion blue : red is 1 : √2.
On a second slide
A ride to slide
We had to climb
From the hill in the winter
With my brother and sister
In our childhood, I remember
And sometimes tears were sliding down our frozen cheeks
Snowflakes were sticking everywhere
In an cold and icy winter