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it is a kite ! it has 2 pairs of equal sides and three obtuse angles by ansu
an equalateral triangle. im not sure if thats how you spell it.
With quadrilaterals, if there are three equal angles, then we know that the fourth angle must be equal, so the quadrilateral is a rectangle. * * * * * That is absolute rubbish. You can have a quadrilateral with three angles of 70 degrees and the fourth of 150 degrees. There is no name for such quadrilaterals and the only thing that can be said about them is that they are irregular.
An acute angled triangle.
Any regular polygon, by definition has equal sides and angles. Also Rhombus and Star see the link