Answer:
x = 40 degrees
Explanation:
By corresponding angles, the angle above the 75 degree angle is also 75 degrees. Since angles of a triangle add to 180 degrees, x=180-75-65 = 40 degrees.
Since the two bases are parallel to each other, by the Corresponding Angles Theorem, the left angle of the upper triangle must also be 75°.
And since the interior angles of a triangle always equal 180:
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