Horizontal and parallel lines e and f are cut by transversals c and d. All angles are described clockwise, from

Horizontal and parallel lines e and f are cut by transversals c and d. All angles are described clockwise, from uppercase left. At the intersection of lines e and c, the angles are: 1, 2, 4, 3. At the intersection of lines f and c, the angles are 5, 6, 8, 7. At the intersection of lines e and d, the angles are: 9, 97 degrees, 12, 11.

At the intersection of lines f and d, the angles are 13, 14, 16, 15.
What is the measure of Angle15?
A. mAngle15 = 77°
B. mAngle15 = 83°
C. mAngle15 = 93°
D, mAngle15 = 97°


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