No.
Yes
A trapezoid can have either one or two acute angles.
The base angels of a trapezoid are the angles that attach to the legs of the trapezoid. There are four base angles in a trapezoid.
None. A trapezoid has 4 angles, but not 4 angels.
no it has two acute acute and two obtuse
A trapezoid has a pair of equal valued obtuse and a pair of equal valued acute angles.
Yes it can have a mixture of acute, obtuse and right angles that all add up to 360 degrees.
Sides cannot be acute.
A trapezoid can have 2 right angles, 1 acute angle and 1 obtuse angle that all add up to 360 degrees and it has a pair of parallel sides.
The sum of all the interior angles of any trapezoid is 360 degrees.
Yes
Trapezoids can have various angle configurations, but they do not necessarily have to have 2 obtuse and 2 acute angles. A trapezoid can have two acute angles and two obtuse angles, or it can have all angles being right angles in the case of a right trapezoid. The specific angles depend on the type of trapezoid and the lengths of the sides.