They all have 4 interior angles that add up to 360 degrees
They have 1 pair of parallel sides of different lengths
They have 4 sides
Their area = 0.5*(sum of parallel sides)*height
They are in the family of quadrilateral shapes
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Some trapezoids, not all.
3:1
false
No equation can have that property. It cannot be an equation if it is not true. If necessary, the domain must be amended. An equation can have different forms over different parts of its domain.
The addition property of equality states that if you add the same number to both sides of an equation, then the sides remain even. This means that the equation remains to be true.