perimeter of triangle , perimeter of rectangle , area of triangle , area of rectangle and area of cuboid
Answers
Answer:
Rectangle is a four sided-quadrilateral having all the internal angles to be right-angled (90o).
It is to be noted that in a rectangle the opposite sides are equal in length which makes it different from a square.
For example, if one side of a rectangle is 20 cm, then the side opposite to it is also 20 cm.
Rectangle
A rectangle is characterized by length (L) and width (W). Both length and width are different in size.
In the figure above, a rectangle ABCD has four sides as AB, BC, CD, and DA and right angles A, B, C, and D. The distance between A and B or C and D is defined as the length (L), whereas the distance between B and C or A and D is defined as Width (W) of the given rectangle.
Real world application of Rectangles:
Table, Book, TV screen, Mobile phone, Wall, Magazine, Tennis court, etc.
Perimeter of a Rectangle:
The perimeter is defined as the total distance around the surface.
Mathematically Perimeter is given as-
P=2(Length+Width) unit length
Area of Rectangle:
Before calculating the area of a rectangle, let us know what exactly an area is. An area is a way of measuring how much space is contained inside a particular figure.
Mathematically, it is given as-
A=Length×Widthunit2
List of Properties of Rectangle:
To understand the properties of a rectangle, let’s learn what is a rectangle first. As we have seen many different shapes which are either 2 dimensional or 3 dimensional and so on. Out of these shapes, Rectangle is an important two-dimensional shape. It is a four-sided polygon. All the four sides are straight with four right angles i.e each angle is a right angle in a rectangle. The most common everyday things we see and is rectangular in shape is Television, computer screen, notebook, mobile phones, CPU , Notice boards etc.
It’s a parallelogram with four right angles.
It’s diagonals bisect each other.
The opposite side of a rectangle is equal.
The opposite side of the rectangle is parallel.
The area of a recangle is = l x b, where l = length and b = breadth.
The perimeter of a rectangle is 2(l + b ).
The sum of all the interior angle of a rectangle is 3600
The diagonal of a recatngle acts like a diameter of its circumference.
perimeter of rectangle-2( l+b)
area of triangle-1/2 lb
area rectangle-lb
area of cuboid-lbh
perimeter of triangle - sum of all the side