It can be deduced from the information given that the value of angle F in the quadrilateral is 90°.
From the complete information given, ABCD is the baseball "diamond," a square measuring 90 feet on a side and points A, B, E, H are collinear.
In this case, in a cyclic quadrilateral, the sum of a pair of opposite angles is 180° since it's supplementary. Therefore,
F + 90° = 180°
F = 180° - 90°
F = 90°
In conclusion, F is 90°.
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