1 It's known as a quadrilateral because it has 4 sides
2 It can be a regular polygon in the form of a square having 4 equals sides and angles
3 It has 2 diagonals
4 It will tessellate leaving no gaps or overlaps
5 Its perimeter is the sum of its 4 sides
6 It can be in the shape of a rhombus or a parallelogram
7 In can form the shape of a kite
8 It can be a rectangle having 4 equal right angles of 90 degrees
9 It can be in the form of a trapezoid or a trapezium
10 It can be an isosceles trapezoid having 1 line of vertical symmetry
11 Its area is normally base times perpendicular height
12 It has 4 lines of symmetry in the shape as a square
13 Its area is 0.5*(sum of parallel sides)*height if it is a trapezoid
14 Its diagonal meet at right angles in the form of a rhombus
15 Its diagonals meet at right angles in the form of a kite
16 Its diagonals intersect at right angles when square shaped
17 Its area is 0.5*product of its diagonals if they meet at right angles
18 It can form two triangles
19 Its 4 interior angles add up to 360 degrees
20 It's subject to the rules of trigonometry
21 It can be similar to other quadrilaterals having the same angles and proportionally similar dimensions
it depends on the other diffrent properties of the shape * * * * * A quadrilateral. If you have more information about the properties of the shape, there may be a more precise name, but a quadrilateral is the general name.
I suggest you take a look at the Wikipedia article on "triangle", or at some similar source. I am sure you can find lots of interesting facts there.
If the system is truly forgotten then nobody will remember even one fact about it - leave alone a score or more!
A chevron (arrowhead) is a quadrilateral with one angle of more than 1800.
Quadrilateral is a broad category. Within the category quadrilateral, you have trapezoid, rhombus, square, rectangle, and more.
A square is a special type of rectangle; therefore it has all the properties of a rectangle. Any property that a rectangle has, a square has as well. This includes the facts that it has four right angles (that's where the name "rectangle" comes from), that opposite sides are parallel, that opposite sides have the same length, and that diagonals have the same length.
Yes. A rhombus is defined as a quadrilateral (a 4-sided figure) with some additional properties. Specifically, all four sides are the same length. This also implies that opposite sides are parallel.
An octagon has 8 sides and a quadrilateral has 4 sides.An octagon has 8 - 4 = 4 more sides than a quadrilateral.
A quadrilateral. (There isn't a more specific word for it.)
False ~
A quadrilateral always has 4 sides... no more no less.
A decagon has 10 sides, and a quadrilateral has 4 sides, therefore a decagon has 6 more sides than a quadrilateral.