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January 27, 2015

January 27, 2015

Posted by **Shane** on Sunday, March 3, 2013 at 3:04am.

- maths -
**Damon**, Sunday, March 3, 2013 at 3:13amlook at triangle of altitude (13/2) = 6.5 and base (17/2) = 8.5

x = half of angle between diagonals.

tan x = 8.5/6.5

x = 52.6

2x = big angle between diagonals = 105.3 degrees

small angle between diagonals = 180 - 105.3 = 74.8 degrees

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