Respuesta :

Its 43. All triangles add to 180 so 47 + 90 = 137. then subtract 180 - 137 and get 43
The answer is 137 degrees.

The measure of the last INTERIOR angle is 43 degrees. Since that angle and the missing exterior angle are both on a straight line, they must add up to 180 degrees.

180-43= 137

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