Types Of Quadrilaterals | Quadrilateral Facts | DK Find Out
Symmetry If a shape has a line of symmetry, the line of symmetry will divide the Rhombus: (a parallelogram with all four sides of equal length), diagonals. Triangles are just shapes with 3 (straight) sides. Square: A quadrilateral with four equal-length sides and four right angles. but it means that the two segments never meet, even if you were to continue tem infinitely far. Polygons are multi-sided shapes with different properties. Shapes have Lines that come from each corner of a square, meet at a point in the A parallelogram has two pairs of equal sides. It has A rhombus has four sides of equal lengths.
Note that every equilateral triangle is automatically also isosceles. A polygon with four sides. Note that in general the 4-gons can look pretty strange and irregular. There are a handful of special cases we care about.
See below Squares Square: A quadrilateral with four equal-length sides and four right angles. Note that the square can be of differnt sizes and you are allowed to rotate it. Above are several examples of squares. A quadrilateral having four right angles. Again, the rectangles come in different sizes and we can draw them at an angle if we want.
As long as all the angles are 90 degrees, it will be a reactangle. A quadrilateral with two pairs of parallel sides. An equivalent condition is that the diagonals perpendicularly bisect each other. Not all references agree, some define a rhomboid as a parallelogram which is not a rhombus.
Squares, Rectangles, Parallelograms and Other Polygons - EscherMath
An equivalent condition is that the diagonals bisect each other and are equal in length. Rectangles include squares and oblongs.
An equivalent condition is that opposite sides are parallel a square is a parallelogramthat the diagonals perpendicularly bisect each other, and are of equal length. A quadrilateral is a square if and only if it is both a rhombus and a rectangle four equal sides and four equal angles.
This implies that one diagonal divides the kite into congruent trianglesand so the angles between the two pairs of equal sides are equal in measure. It also implies that the diagonals are perpendicular. Although we use words like pentagon and polygon, the term quadrilateral has completely replaced tetragon. The seldom used term quadrangle has exactly the same meaning as quadrilateral, however the two related terms -- complete quadrangle and complete quadrilateral -- describe essentially different configurations.
A quadrilateral may be convex or concave see the diagram below. A quadrilateral that is concave has an angle exceeding o.
Types of quadrilateral
In either case, the quadrilateral is simple, which means that the four sides of the quadrilateral only meet at the vertices, two at a time. So that two non-adjacent sides do not cross. A quadrilateral that is not simple is also known as self-intersecting to indicate that a pair of his non-adjacent sides intersect. The point of intersection of the sides is not considered a vertex of the quadrilateral. The shapes of elementary geometry are invariably convex.
Quadrilateral - Wikipedia
Starting with the most regular quadrilateral, namely, the square, we shall define other shapes by relaxing its properties. A square is a quadrilateral with all sides equal and all angles also equal. An equiangular quadrilateral, i. An equilateral quadrilateral, i.
In a square, rectangle, or rhombus, the opposite side lines are parallel.