Not true because all quadrilaterals contain 2 triangles
No. It is just the person preference.
Yes, Some can even be formed into a square and two triangles or a rectangle and one or two triangles. Just drop perpendicular(s) from the vertex (vertices) of the short side to the long side (that is to say, the two sides which are parallel). That will form one or two right triangles and a rectangle of some sort...could be a square--all squares are rectangles but not all rectangles are squares.
Squares, rectangles, and some triangles, most commonly. Any polygon could have a right angle if it is irregular.
Squares, circles, rectangles, and some triangles have more than 1 line of symmetry.
no some rectangles cannot be similar. a rectangle is a shape with 2 = sides and then 2 more different = sides. it is impossible because if 2 rectangles were similar than that would not be a rectangle. similar means having corresponding sides no it is not possible
It is NOT as case of 'Some'. It is ALL rectangles are parallelograms.
A polygon is described as being a plane shape with straight sides as a two dimensional shape. Some examples include triangles, squares, and rectangles.
All rectangles are quadrilaterals. A quadrilateral has 4 sides; all rectangles have 4 sides; thus all rectangles are quadrilaterals.
All triangles and regular polygons such as squares, parallelograms, trapezoids, and rectangles are convex because each of their interior angles is less than 180o.
There are many, many shapes with corners. Each has its own name. Some examples are: Rectangles, Triangles, Septangles, parallelograms, trapezoids, cube, dodecahedrons, and so forth.
Any and all squares and rectangles. Every one of these two shapes has only right angles. Though some triangles also have right angles.
All rectangles are parallelograms, so yes there are some.