Let DC = 1 unit.
a = 180-36+30
a = 114°
a is angle BDC.
(1/sin36) = (b/sin114)
b = 1.55421636402 units.
b is BC.
c = 180-60-54
c = 180-114
c = 66°
c is angle BAC.
Therefore;
(1.55421636402/sin66) = (d/sin(54))
d = 1.37638192047 units.
d is AB.
It implies;
DC ÷ AB
= 1÷1.37638192047
= 0.72654252801
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