There are two circles of equal size, with their centers
and
on each other's edge. The points
and
are placed on the circle with center
, and the point
is placed on the circle with center
, such that
lies on
, and
lies on
. What is angle
, if
?
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6 3 ∘ + 6 3 ∘ + x + 2 x = 1 8 0 ∘
3 x = 5 4 ∘
x = 1 8 ∘
And therefore ∠ C D E = 1 8 ∘ .