NOTE: Squares, Rectangles and Rhombuses are all Parallelograms!

Yes, always. Is a kite a rectangle? Sometimes (when it’s a square).

A rectangle has 4 right angles, and a square has four equal sides and four right angles. Likewise, every square is also a rectangle, because a rectangle has 4 right angles, but every rectangle is not a square. Kites. Kites are a special type of quadrilateral with two distinct pairs of consecutive sides the same length.

With a hierarchical classification, a rhombus (a quadrilateral with four sides of the same length) is considered to be a special case of a kite, because it is possible to partition its edges into two adjacent pairs of equal length, and a square is a special case of a rhombus that has equal right angles, and thus is …

The intersection of the diagonals of a kite form 90 degree (right) angles. This means that they are perpendicular. The longer diagonal of a kite bisects the shorter one.

A square has all its sides equal in length and a rectangle has its parallel sides equal.

A quadrilateral is a rhombus but not a square if ,

1. A. its diagonals do not bisect each other.
2. B. its diagonals are not perpendicular.
3. C. opposite angles are not equal.
4. D. the length of diagonals are not equal.

THEOREM Converse: If a parallelogram has congruent diagonals, it is a rectangle. the figure joining, in order, the midpoints of the sides of a rectangle is a rhombus, and the figure joining, in order, the midpoints of the sides of a rhombus is a rectangle.

It’s called oblong. The following picture is from wikipedia. If you talk about one specific rectangular, you can just call it a rectangular. This usually implies that you do not mean a square because you did not name it a square.

A parallelogram is a quadrilateral with 2 pairs of opposite, equal and parallel sides. A rectangle is a quadrilateral with 2 pairs of opposite, equal and parallel sides BUT ALSO forms right angles between adjacent sides. The same way that not all rectangles are squares, not all parallelograms are rectangles.

A convex quadrilateral is a rectangle if and only if it is any one of the following:

• a parallelogram with at least one right angle.
• a parallelogram with diagonals of equal length.
• a parallelogram ABCD where triangles ABD and DCA are congruent.
• an equiangular quadrilateral.
• a quadrilateral with four right angles.