Kervie2001id
Answered

is a rectangular a parallelogram?

Sagot :

Xander01id
A parallelogram is a 4-sided shape where opposites sides are parallel. A rectangle is a special case of a parallelogram. All rectangles are parallelograms. 

But a rectangle is a shape where opposites sides are parallel *and* all the corners are 90 degree angles. So you can't say that all parallelograms would be rectangles. Some parallelograms would be rectangles, but not all. 

Rectangles are a subset of the shapes called parallelograms. But parallelograms are *not* a subset of the shapes called rectangles. 

It's similar to saying all cars are vehicles. But you can't say that all vehicles are cars.
It depends.

If you mean rectangle, yes it is a parallelogram which is a plane figure. 
But if you mean rectangular, it must be followed by a noun because rectangular is an adjective.

Take this for example:
Example A: The shape of a lot (a parcel of land) is a rectangle. In a word problem, this is paraphrased as:  A rectangular lot has lot area of ____ , or an area of ______, but NEVER a volume or capacity of ________ because it is a plane figure (polygon) - flat, no height, only width and length.

Example B:  The shoe box is rectangular.  In a word problem, this is paraphrased as:  A rectangular box has length, width, and height or ___ cm, _____, cm, ____, respectively.  You'll be asked to compute for its Volume and Surface Area.  It is 3-dimensional solids (polyhedron), not flat.  

Hope this helps.