A side of the triangle below has been extended to form an exterior angle of 127°. Find the value of x.
17°
xº
127°

x = 53°

Step-by-step explanation:

x + 127° = 180° (sum of angles on a straight line/supplementary angles)

Subtract 127 on both sides

x + 127 - 127 = 180 - 127 (subtraction property of equality)

x = 53°

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