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10
It has never had this many; the most was 1980 with 69.
pi over three is 60 degrees.
An obtuse angle can be any angle over 90 degrees and below 180 degrees (anything over that is a reflex angle)
270
Killeen has had 45 days of temps over 100 degrees. The record is 55 days over 100 degrees in 1980
10
47
zero
43 as of September 1.
52
35
Data as of September 7, 2011:Number of Days of 100 degrees or higher in DFW in 2011: 66Consecutive Days of 100 degrees or higher in 2011: 40 (July 2 to August 10)Days over 100 Degrees in 1980: 69Consecutive Days Over 100 in 1980: 42
43 as of September 1.
43
75
According to the National Weather Service there have been 77 days over 100 in 2011.