April 20th, 2007

speed limit

When I Was One-and-Twenty

When I was one-and-twenty
I heard a wise man say,
"Give crowns and pounds and guineas
But not your heart away;
Give pearls away and rubies
But keep your fancy free."
But I was one-and-twenty,
No use to talk to me.

When I was one-and-twenty
I heard him say again,
"The heart out of the bosom
Was never given in vain;
'Tis paid with sighs a-plenty
And sold for endless rue."
And I am two-and-twenty,
And oh, 'tis true, 'tis true.
--A.E. Housman

Heavenly bodies

Last night as I was walking home from the Troop Committee meeting, the moon was sinking toward the western horizon. Earthshine was in evidence -- what we call "the old moon in the new moon's arms." The moon was a slim crescent, but you could see the shadow of the whole moon as a dark circle against the dark sky. A bright planet -- probably Venus -- was blazing upward of the moon and to her left. It was very beautiful.

Dear LJ Fairy: I've got this math problem

I'm working up an orienteering course, which requires me to calculate the interior angles of Right Triangles. I know all the lengths of the sides, and of course, the angle opposite the hypoteneuse is 90 degrees. How do I find the number of degrees in the other angles? I need the magic formula, please.