Answer:
61
Explanation:
Since ED and EF are congruent, Angle D = Angle F meaning angle F is also x degrees.
From here, we can use the total sum of angles in a triangle = 180 to calculate x:
180 = 58 + x + x
180 = 58 +2x
122 = 2x
x= 61 degrees
61 degrees
180 - 58 = 122
Since both sides are congruent, 122/2 = 61
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