Students in this video, let's discuss rectangles in great detail, but what is a rectangle?
A rectangle is a program.
So that's an important thing.
It is a type of a program that means the opposite sides in a rectangle are equal and parallel.
So these two sides are of the same length and these two sides are of the same length.
And also, this side is parallel to the side and you will see that this side is parallel to this side.
Now, what else is there about a rectangle?
Every angle over here, every internal angle will be equal to 90 degrees in a rectangle.
So this type of a shape is called a rectangle.
Now, let's call in as the length and we as Debrett.
Now, what would be the perimeter of this rectangle?
It's just the length of the border, right.
So that's in plus B plus L plus B, we will see that the perimeter is two times the length plus breadth.
All right.
So over here you have a perimeter.
And see, the sides are given us two centimetre and six centimeter to what would be the perimeter.
It would be to in the eight, which is equal to 16 centimeter.
Now, how do you find the area of a rectangle?
The area of a rectangle is equal to length and breadth.
Why is that?
So we have seen before that the area of a Parlo Graham is said into its height right over here.
Also, you can see that because this angle is ninety degrees.
This site itself is the height when you take L as the base to over here also you have basing the height
that is length in the breadth that gives you the area of this rectangle.
All right.
So what's the area of this rectangle over here?
That would be six in the two, which is equal to 12 centimetres square.
All right.
Now, let's do a very basic question to solidify what we have learned over here.
A rectangular park is fifty five metres long and 40 metres wide at about one point five metres is constructed
outside the park by the area of the port and the area of the park.
So that's not a diagram.
We know that this is the park and this outside is the part which is constructed around the park over
here.
It's given that the length of the park is fifty five metres and the breadth is 40 metres and the width
of the path is one point five metres.
Now we can directly find the area of the park, which is length in the bread that is fifty five to forty
and that gives you two thousand two hundred metres square.
Now let's find the area of the park around the park.
All right, now, let me do these constrictions over here now, over here, you can see that this length
over here will be one point five meter and this length over here will be one point five meters.
So this area over here will be one point five into one point five.
That gives me two point to five meters square right now.
What about this area over here?
This will be fifty five into one point five, right?
This is also a rectangle.
You can see the length is fifty five and Britta's is one point five.
So this area over here is fifty five and one point five.
That gives me eighty two point five meters square.
All right.
But what about this area over here?
That's forty one point five and that is equal to 60 Meter Square right over here.
Also, you have a rectangle and one side is 40 and the other side is one point five.
Now, to find this area over here, all I need to do is I need to add these four corners.
Right.
So these areas are two point five.
Meta two point two, five meter squares, that's four times to point to five plus two times 60.
Right, because you have this over here at 60 and you have this over here a sixty two times 60 plus
two times eighty two point five, because also you have eighty two point five metre square.
And when you add these together you will get the answers to ninety four meter square.