Different Parts of Circle |
CIRCLE:
A circle is a set points that are all the same distance from a given point called the center.
Radius:
The distance from the center of the circle to any point on the circle itself.The symbol r is used for the radius.
Drawing of Perfect Circle with Help of Geometry Box`s Compass |
Diameter:
The length of a line that passes across a circle through the center. The diameter is twice the size of the radius. the symbol d is used for the diameter.
Circumference:
The circumference of a circle is the distance around the circle.To determine the circumference of a circle, use either of these two equivalent formulas:
2 */\* r or /\*d (r = Radius , d = Diameter , /\ (Pi) = 3.14 or 22 / 7).
Drawing of Perfect Circle with Help of Geometry Box`s Compass |
Area Of A Circle:
The area of a circle is the space its surface occupies. To determine the area of a circle, use this formula:
Area = /\* r ^ 2 or /\ *r*r
Quadrilateral:
Different Types of Quadrilaterals and Polygons like Pentagon,Hexagon and Octagon |
In Euclidean plane geometry, a quadrilateral is a polygon with four sides (or edges) and four vertices or corners. Sometimes, the term quadrangle is used
The interior angles of a simple quadrilateral A B C D add up to 360 degrees of arc.
There are special types of quadrilateral:
Types of Quadrilateral
Some types are also included in the definition of other types! For example :
1) Parallelogram
2) Rhombus
3) Rectangle
4) Square
5) Trapezium
1) PARALLELOGRAM:
Picture of Parallelogram |
Parallelogram is a quadrilateral ( Four sided closed shape ) whose two opposite sides are equal and parallel ,The opposite angles are the same size, but they don`t have to be the right angles. Parallelogram looks like a rectangle leaning to one side.
Area = Base * Height
The base is the size of the side on the bottom. The height (or altitude) is the size of a perpendicular line drawn from the base to the side opposite it. The height of a rectangle and a square is the same as the size of its vertical side.
Drawing Picture of Parallelogram on Paper |
Perimeter = sum of all four sides
in case of Parallelogram (opposite sides are equal in length)
Perimeter = 2 ( Length + width)
2) RHOMBUS:
Picture of Rhombus |
Rhombus is a parallelogram where all for sides are equal in size but they don`t have to be right angles.
Drawing Picture of Rhombus on Paper |
3) RECTANGLE:
Picture of Rectangles |
Rectangle is a quadrilateral ( Four sided closed shape ) whose two opposite sides are equal and parallel having angles of 90 degrees on all four sides.
Area = Base * Height
The base is the size of the side on the bottom. The height (or altitude) is the size of a perpendicular line drawn from the base to the side opposite it. The height of a rectangle and a square is the same as the size of its vertical side.
Picture of Rectangles |
The area formula for the rectangle and square may be expressed in an equivalent from as:
Area = Length * Width
Perimeter = sum of all four sides
in case of rectangle (opposite sides are equal in length)
Perimeter = 2 ( Length + width)
Drawing Picture of Rectangle on Paper |
4) SQUARE:
Picture of Squares |
Square is a quadrilateral ( Four sided closed shape ) whose all four sides are equal and parallel having angles of 90 degrees on all four sides.
Area = Base * Height
The base is the size of the side on the bottom. The height (or altitude) is the size of a perpendicular line drawn from the base to the side opposite it. The height of a rectangle and a square is the same as the size of its vertical side.
Drawing Picture of Squares on Paper |
The area formula for the rectangle and square may be expressed in an equivalent from as:
Area = Length ^2 ( in case of square Length = Width)
Perimeter = sum of all four sides
in case of square (opposite sides are equal in length)
Perimeter = 4* Length (Length = Width)
5) TRAPEZIUM:
Picture of Trapezium |
It is a Quadrilateral (four sided polygon) which have all four sides are not equal and all four angles are not equal and not 90 Degrees.
Drawing Picture of Trapezium on Paper |
PENTAGON:
Picture of Pentagon |
The closed plane (flat) figure Polygon which have five sides. To find the perimeter of a Pentagon ,add the lengths of the all five sides.
HEXAGON:
Picture of Hexagon |
The closed plane (flat) figure Polygon which have six sides. To find the perimeter of a Hexagon ,add the lengths of the all six sides.
OCTAGON:
Picture of Octagon |
The closed plane (flat) figure Polygon which have Eight sides. To find the perimeter of a Octagon ,add the lengths of the all Eight sides.
Different Types of Quadrilaterals and Polygons like Pentagon,Hexagon and Octagon |
Different Types of Quadrilaterals |
I want discuss all of these into a short note as In General, Quadrilateral means four sides but in geometry we can say any four sided shape is quadrilateral with a condition sides have to be straight and it has to be 2 dimensional. example a square, rhombus, trapezium and rectangle are also parallelograms.
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