There is no specific name for such a quadrangle.
a quadrangle with only one right angle
its akite
a kite
If the question is about only one right angle, then the answer is a kite, arrowhead or a miscellaneous quadrangle which has no specific name.
maybe a trapezoid?
a square,trapzoeid,and a kite
OK, got it! What's the next step ?
it is a square,trapizoid,or a kite * * * * * If it is exactly one right angle, it can only be a kite or an irregular quadrilateral/ If it is one or more, the above are candidates but what about a rectangle?
There are an infinite number of different ones, and there's no other way to describe them other than " four sides with only one right angle ".
A triangle can have only one right angle (90o). Such a triangle is called a right triangle.
A right angle measures 90 degrees.
1. A triangle is a right triangle if and only if it has a right angle. 2. A triangle has a right angle if and only if it is a right triangle.