Hi!
This is definitely a trapezoid, as it has two equal sides and two inequal sides. It's not a parallelogram, because two sides eventually intersect. It is a quadrilateral, because it has four sides.
None of the others apply here.
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Answer:
50
Step-by-step explanation:
140- 40=100
100÷2=50
x=50
5 equals 5/1. Simple as that.