<PRE><B>Question 1108294</B>
triangle CDE is a right triangle with m ECD = 90 degrees
:
m CED + m CDE = 180 - 90 = 90 degrees
:
m CED = 2 x m CDE
:
let z = m CDE, then M CED = 2z
:
z + 2z = 90
:
3z = 90
:
z = 30
:
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m CED = 2 x 30 = 60 degrees
m CDE = 30 degrees
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:
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