Swing Frame

I speak of Two executives who have a swing up. Swing two or three swings and children should be safe. Should I use equilateral triangles with 60 degrees in every corner?

The range of the base of A are the exception, the stronger it will be the angles of your legs should be equal, in relation to land, then all that these two are subtracted from 180 is added to the degree necessary to edge of A.

For example, the angles 2 75 degrees on the bottom,

(75 75) - 180 = 30 degrees at the top
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