Question 1201837
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Extending the two sides to meet at T forms a triangle with the third side of the nonagon in which two of the angles are exterior angles of the regular nonagon.<br>
The measure of each exterior angle of a regular nonagon is 360/9 = 40 degrees.<br>
The sum of the angles of the triangle is 180 degrees, so the measure of angle T is 180-2(40) = 100 degrees.<br>
ANSWER: 100 degrees<br>