A chevron (arrowhead) is a quadrilateral with one angle of more than 1800.
I don't think there's a special name for that.
because if it has more than three obtuse angles than its not a quadrilateral.This is because a quadrilateral has 360 degrees, right? Well an obtuse angle is an angle greater than 90 degrees. That being said the smallest obtuse angle you can have is 91 degrees. If you have four obtuse angles, then the sum of them is greater than 360 (ex: 91+91+91+91=364) and it's geometrically impossible to draw a quadrilateral with 4 obtuse angles.Three obtuse angles are possible if the fourth is acute(less then 90 degrees) and they all add up to 360.-skerr7464
Well, honey, drawing a quadrilateral with one reflex angle is as easy as pie. Just sketch out four sides, make sure one angle is greater than 180 degrees, and voilà, you've got yourself a quadrilateral with a reflex angle. Just remember, it may look a little wonky, but hey, math isn't always pretty.
No. Three sides of a quadrilateral must total more than the remaining side. As two sides of 6 and one of 1.5 add up to 13.5, that means that the sides could never meet at fourth angle.
An angle more than 90o and less than 180o is an obtuse angle. An angle more than 180o is a reflex angle.
No.
An arrowhead
A reflex angle is over 180 degrees, but the sum of the angles in a quadrilateral, concave or convex, is 360. Therefore, since 180+180=360, you can't have any more degrees even without the amount over 180 that the reflex angle has.
Any quadrilateral other than a square or kite could have diagonals meeting at 30 degrees.
A general quadrilateral or a kite.
Yes
Any angle <360 degrees is possible, though it would be a concave quadrilateral if the angle were greater than 180 deg.
a rectangle
No because the 4 interior angles of a quadrilateral add up to 360 degrees
No, a quadrilateral can't have three acute angles and one right angle. The angles of a quadrilateral must total 360. The three other angles of a quadrilateral with one right angle would then have to total 270 degrees. If all three were acute (less than 90 degrees), they could not total 270.
I don't think there's a special name for that.
A four-sided shape with one right angle is a quadrilateral. There is no more specific term, unless it has more than one right angle or has equal sides.