a triangle a triangle
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If you mean shape there is no such shape. if a 4 sided shape has 2 right angles it MUST be either a square or a rectangle, in which case there are actually 4 right angles and 2 pairs of parallel sides. =)
There is no such shape because the 4 angles in a 4 sided quadrilateral must add up to 360 degrees no more and no less . Therefore 2 obtuse angles and 2 right angles are greater than 360 degrees which doesn't quite measure up for the requirements of a 4 sided quadrilateral.
It is a square or a rectangle
a parallelogram
900° The formula for the sum of the angles of an n-sided figure is (n-2)x180°. For a 7 sided shape this would be (7-2)x180° = 5*180° = 900°