Rectangles and squares.
No you can have up to four, but that's it.
Yes, a quadrilateral can have two obtuse angles. In fact, a quadrilateral can have up to four angles, and as long as the sum of all four angles equals 360 degrees, it can accommodate two obtuse angles. The remaining angles would need to be acute or right angles to satisfy this condition.
No, a quadrilateral does not necessarily have any right angles. If it has a right angle, it will necessarily have four right angles, and will be a rectangle. But not all quadrilaterals are rectangles. As long as a polygon has four sides, it is a quadrilateral. It might have, for example, two angles of 100o and two angles of 80o.
a rectangle
A rectangle is classed as a 4 sided quadrilateral in math.
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Rectangle.
A right trapezium or an irregular quadrilateral.
A rectangle is actually a parallelogram, or a quadrilateral with two pairs of parallel sides. The thing about a rectangle is that it not only has two parallel sides, it has four right angles. Therefore, the answer to your question is: A rectangle is a parallelogram with four right angles.
If you are saying a quadrilateral that only has two right angles I believe it is a trapezoid. A square or other rectangle, all of which have four right angles, also satisfies all the conditions explicitly given.
A quadrilateral has four interior angles. It may have two, three, four, or none of them congruent.
a square