Jean Monnet worksheet circle pb

In the adjacent figure, points A, B, C, D, and E divide the circle into five arcs of equal measure, and {T} = AC [math]\cap[/math] BD.
a)
Construct angle AED.[br]Find the measure of angle [math]\angle[/math]AED.
b)
Prove that points E and T are symmetric with respect to the line AD.
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