Good luck trying to draw this one !
Any two sides of a triangle are greater that the third; 40+40<100, so no triangle.
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The answer would actually be 40 because180-140=40.
180o - 100o - 40o= 40o=====
The other two angles will be 40 degrees each.
obtuse
The 3rd angle is 30 degrees which would form an obtuse or scalene triangle.