Two equilateral triangles share a side midpoint. What is the angle α?
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Solution
The angle α is 120°.
Poem
The pendulum
Swings back and forth
Tirelessly
It gives rythm to time
Moves to and fro
In motion
By it’s oscillations
Left swing
Right swing
And so is life
Sometimes good or bad
It was Galileo’s game
With velocity
And gravity
Let’s move the pendulum
To direct our energy
