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Q: What makes a quadrilateral and a parallelogram different from a rectangle?

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A rectangle is defined as "a parallelogram with one right angle" A parallelogram is defined as "a quadrilateral with opposite sides equal and parallel" This makes a rectangle a sort of second-generation quadrilateral!

It is a right angled parallelogram.

The distance between the opposite vertices is the same.

A trapeziod is a plane figure bounded by four straight sides. That makes it a quadrilateral. It does not have two sets of parallel lines so it cannot be a parallelogram.

no parallelograms can have either obtuse or acute angles. however not a right angle s it makes it a rectangle

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A rectangle is defined as "a parallelogram with one right angle" A parallelogram is defined as "a quadrilateral with opposite sides equal and parallel" This makes a rectangle a sort of second-generation quadrilateral!

A quadrilateral is a parallelogram if it has two pairs of (opposite) sides that are parallel.

It is a right angled parallelogram.

All four of the angles of a rectangle (and of squares) are right angles.(Its name comes from this : rect-angle.)

A quadrilateral is any four sided plane figure. A parallelogram has the two opposite sides parallel. This makes to two opposite sides of equal length. The figure does not necessarily have right angles. A quadrilateral can be;- square, rectangle, rhombus, parallelogram, (a)symmetric trapezium, a kite, or an irregular shape/form.

4 right angles

A parallelogram with a right angle is a rectangle.

They are what makes it a rectangle. The rectangle is a special kind of parallelogram. The perpendicular lines cause it to be called a rectangle.

2 triangles together and a parallelogram is a quadrilateral that has 2 sets of equal sides. ☺

A rectangle is a special form of parallelogram that has adjacent sides perpendicular to each other or all the inside angles are 90 degrees.

Not only can a rhombus be a parallelogram, it must be one. A rhombus is a quadrilateral which has two pairs of parallel lines. That makes it a parallelogram.

The main difference between a rectangle and a parallelogram that makes rectangle a special case of the parallelogram is the fact that all the angles of a rectangle are equal to 90 degrees. This is not the case in a parallelogram because the adjacent angles are only supplementary to each other.

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