Calculating x.
a = ½(180-60)
a = ½(120)
a = 60°
a is angle DCO = angle COD = angle CDO, making triangle CDO equilateral.
b = a-45
b = 60-45
b = 15°
b is angle ECO = angle CEO.
c = 180-2b
c = 180-2(15)
c = 150°
c is angle COE.
It implies, length x is;
x² = 6²+6²-2*6*6cos150
x² = 134.353829072
x = √(134.353829072)
x = 11.5911099154 units.
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