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Some irregular hepagons, for example.

Some irregular hepagons, for example.

Some irregular hepagons, for example.

Some irregular hepagons, for example.

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Some irregular hepagons, for example.

Q: What shape has no right angles and only one pair of adjacent angles equal?

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square

A rectangle is the only such shape. Not sure about the "little" right angles: all right angles are of the same measure.

All squares have TWO SETS of opposite, parallel sides. A square is a parallelogram with 4 equal sides and 4 equal angles (right angles) of which adjacent sides are perpendicular. The related parallelogram, the rhombus, or "diamond" shape, also has 4 equal sides, but no right angles, where opposite angles are equal and adjacent angles are supplementary (sum to 180 degrees).

A kite.

Rhombuses are paralellograms. Also, they're what you might call a diamond.* * * * *Not a particularly useful answer since a rectangle is also a parallelogram. The two differences are:all the sides of a rhombus are of equal length while in a rectangle opposite sides are equal but adjacent sides are usually not equal (if they are, then the shape is a square);all the angles of a rectangle are right angles while in a rhombus opposite angles are equal but adjacent angles are usually not equal (if they are, then the shape is a square).

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This is a rectangle.

You have described a rectangle.

It is possible, yes.

square

A shape that has 2 pairs of equal sides and no right angles is a kite or a parallelogram. In a parallelogram, each side is equal to the one directly opposite; in a kite, the equal sides are adjacent to one another.

A rectangle. If there are equal adjacent sides it's a square.It is a square or a rectangle both of which are 4 sided quadrilaterals

A rectangle is the only such shape. Not sure about the "little" right angles: all right angles are of the same measure.

All squares have TWO SETS of opposite, parallel sides. A square is a parallelogram with 4 equal sides and 4 equal angles (right angles) of which adjacent sides are perpendicular. The related parallelogram, the rhombus, or "diamond" shape, also has 4 equal sides, but no right angles, where opposite angles are equal and adjacent angles are supplementary (sum to 180 degrees).

dimond it is the most esayest thing in the world

A kite.

Rhombuses are paralellograms. Also, they're what you might call a diamond.* * * * *Not a particularly useful answer since a rectangle is also a parallelogram. The two differences are:all the sides of a rhombus are of equal length while in a rectangle opposite sides are equal but adjacent sides are usually not equal (if they are, then the shape is a square);all the angles of a rectangle are right angles while in a rhombus opposite angles are equal but adjacent angles are usually not equal (if they are, then the shape is a square).

No. The term is actually applied to a different geometric shape: one with adjacent pairs of equal angles (truncated isoceles triangle). There is such a geometric shape as a "right trapezium" (US) and a "right trapezoid" with adjacent right angles (e.g. "the doorstop" or truncated rectangle that includes a square or rectangular segment).