MENUSURATION. INTRODUCTION. Menusuration is the study of lengths, perimeters and areas of different shapes. Menusuration deals with rectangles, squares,curves , circles, lines etc. Menusuration is very important in the world of maths and this makes up almost most of the basic geometry.
How can we classify
Hey, can you guys find the perimeter of my land ?
= 46 c.m
perimeter of this
perimeter is the sum of all sides
of a shape,
Here: perimeter = 4c.m+4c.m+8c.m+8c.m
= 24 c.m
II wonder if there is any easy method to find the perimeter of a rectangle, like of a chess board.
rectangle is equal
to twice the sum
of its length and
Perimeter of rectangle= length+length+
= 2 length+ 2 bredth
So finding the perimeter of square will also be easy because we only have to double the length of one side of the square. Isn’t it?
Yeah it might be so!!!!! but
I am not sure.
When length of one side of square= 4 c.m
=4 x side
“Dudes, she does not know how to find the perimeter of an equilateral triangle. I hope you know??? ”
To find the perimeter of an equilateral triangle we just have to add all the 3 sides of it, or as
the equilateral triangle have all its sides equal we can multiply the length of side by 3.
Perimeter of equilateral triangle
= 3 x length of one side.
I wonder what is the formula for finding the area of a rectangle?
I will ask Hermione.
Area of a rectangle = length x breadth
length of rectangle=4 c.m and if
breadth of rectangle=5 c.m then
area of rectangle= 4x5 = 20 c.m2
Will someone tell me the formula to find the area of a square?
I don’t know how to find the area of one side of a dice, which is a square.
Here area of square
= side x side
= 5c.m x 5c.m
Do you know how to find the area of a triangle? Such as a side of a pyramid.
Here, if breadth = 2c.m
and height = 2c.m then,
area = 1 x 2 x 2
Yes, my silly old bear because if a rectangle have all its sides and angles equal then it will become a square.
My garden is a square plot, can I call it as a regular rectangle?
So guys can you tell me the area of a triangle with breadth 8 c.m and height 4 c.m?
= 1 x 32
Tell me the formula for finding the area of a triangle?
Ans: area of a triangle = 1 x breadth x height
Find the height of a triangle of area 6 and breadth 2?
Ans:6 c.marea of a triangle= 1 x b x h
height= area x 2 = 6 x 2
= 6 c.m
Can you tell me, what is meant by regular shapes?
Ans: Regular shapes have all sides equal and all angles also equal.
Hey could you tell us the area of a square with one side=12 c.m?
= 12 x 12
Tell me if I can call a rectangle as a regular square.
No, it is not possible.
Are there figures like regular Hexagon?
Find the perimeter of the following figure?
Perimeter = 2+5+4+1+4+5+2+5+4+1+4+5
= 42 c.m
Can you guys tell me the exact area of a triangle with base 12.5 c.m and height 10 c.m?
= 1 x 12.5 x 10
= 125 = 62.5 c.m2
I know how to do it.
Hey can you tell me the number of presents I have if it is the same number as the length of a rectangle with area 26 and breadth 2?
26= length x 2
length = 26
Santa has 13 presents with him
Regular shapes have all its sides and angles equal