whats the measure of a hexagon
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Each exterior is 360/7 = 51.4 degrees to the nearest tenth
100
tan-1(0.8) = 38.65980825 degrees or 38.7 degrees to the nearest tenth.
Assuming the question refers to a circle with a diameter of 0.9 metres, the circumference is 2.83 m = 2.8 metres to the nearest tenth.
The angle would be 82.4053 degrees, or 82.4 correct to the nearest tenth of a degree.