You have to give more info. A regular quadrilateral can mean a square, or a rhombus. A square has 90 degrees and a rhombus can have from1-89 degrees or 91-179 degrees
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No, that is not correct.
Regular, in the context of a polygon, does not only mean that all ht esides are congruent. It also means that all angles are also congruent. Consequently, a rhombus is not a regular quadrilateral. Only a square is. And the interior angle of a square is 90 degrees.
[As an aside, the angle of a rhombus need not be an integer, and so it need not be restricted to 1-89 degrees. It can be 89.5 degrees, or 89.9995 degrees, etc.]
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90 degrees.
90 degrees
A quadrilateral has 360 interior degrees.360 divided by 4 is 90 degrees.
There is no specific limitation on any one angle of an inscribed quadrilateral.
The 4 interior angles of a 4 sided quadrilateral add up to 360 degrees