Certain kinds of trapezoids only have one pair of equal angles. Like so...
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See? The only congruent angles are the two right angles on the left side. (Ignore the dots, it was the only way I could get my diagram to format properly)
A trapezoid (trapezium) has only 2 sides parallel and not all angles equal
There is no specific name for one with 3 equal angles. All the interior angles in a quadrilateral add up to 360°. So you would have 3A + B = 360. Where angles A = C = D. Now a rectangle has 4 equal angles (90°), so it also has 3 equal angles. And just happens to have the 4th angle equal the other 3.To visualize a quadrilateral with only 3 equal angles: take a square ABCD, and stretch angles A,C & D to 91°. Now angle B will equal 87°.
It is called a square. The clues: equilateral means all sides are of equal length; equiangular means all angles are of the same degrees; quadrilateral means the shape has four sides. The only shape that qualifies is a rectangle [includes squares.]
I am ONLY 9 but here is my answer.......nothing.
Triangle
Diagonally opposite pairs of angles will always be equal, but the only time all angles in a quadrilateral parallelogram are equal is when that shape is a rectangle.
There is no four-sided shape (quadrilateral) with four equal sides where no angles are the same. The diagonally-opposing angles must be the same, and opposing sides must be parallel. The only quadrilateral that fits that description is a parallelogram.
A quadrilateral is any shape with four sides; angles can be acute or obtuse. A perfect square is the only quadrilateral with only right angles.
A regular polygon must have all its sides equal and all its angles equal. The only regular quadrilateral is a square.
No, because a quadrilateral can be many different sizes and lengths as a quadrilateral is any shape with only 4 sides. The sum of all the angles in a quadrilateral equal 360 degrees.
There is no quadrilateral that meets these requirements. It is, of course, possible for a pentagon (or polygons with 6 or more sides) to have 4 equal sides and only 2 right angles.
Yes it is a square is a regular quadrilateral because it is not a unknown shape * * * * * That is an interesting reason - but wrong. A square is the only quadrilateral whose sides are all equal and whose angles are all equal. Both sides and angles must be equal for a polygon to be termed regular.
A rectangle is the only such shape. Not sure about the "little" right angles: all right angles are of the same measure.
Delta
No. Only the sum of the measures of the angles of a triangle equal to 180 degrees; in the case of a quadrilateral it amounts to 360 degrees.
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.
A trapezoid (trapezium) has only 2 sides parallel and not all angles equal