i need a program that will compute area of various geometrical figures - Programmers Heaven

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# i need a program that will compute area of various geometrical figures

Posts: 13Member
I was wishing if someone could write a program that will compute tha area of various figures. This will prompt the user to select a square,rectangle or a triangle. depending on the user selection. and also the prompt should request for the measures. the script will calculate and display the name and the area. the user will be permitted to enter values with decimal places.

square: A =side*side
rectangle A=lenght*width
triangle A=1/2base*height

• Posts: 10Member
There is a nice algorith available to calculate the area of a polygon defined by an array of x,y coordinate pairs.
It relies on the idea that the area formed by any pair of points (Xi,Yi) and (Xi+1, Yi+1) and the points projected onto the X-axis is a trapezium, with area = (Xi+1-Xi)*(Yi+Yi+1)/2.
Some trapeziums will have a negative and some a positive area. If you add all the areas traversing clockwise, the total is the area of the polygon. Going anti-clock gives the negative area.

Clive

• Posts: 13Member
: There is a nice algorith available to calculate the area of a polygon defined by an array of x,y coordinate pairs.
: It relies on the idea that the area formed by any pair of points (Xi,Yi) and (Xi+1, Yi+1) and the points projected onto the X-axis is a trapezium, with area = (Xi+1-Xi)*(Yi+Yi+1)/2.
: Some trapeziums will have a negative and some a positive area. If you add all the areas traversing clockwise, the total is the area of the polygon. Going anti-clock gives the negative area.
:
:
: Clive
:
:

So do you think you can help me out?
Thanks
• Posts: 13Member
: : There is a nice algorith available to calculate the area of a polygon defined by an array of x,y coordinate pairs.
: : It relies on the idea that the area formed by any pair of points (Xi,Yi) and (Xi+1, Yi+1) and the points projected onto the X-axis is a trapezium, with area = (Xi+1-Xi)*(Yi+Yi+1)/2.
: : Some trapeziums will have a negative and some a positive area. If you add all the areas traversing clockwise, the total is the area of the polygon. Going anti-clock gives the negative area.
: :
: :
: : Clive
: :
: :
:
: So do you think you can help me out?

: Thanks

Just some few code to help me complete the program. Please.
:

• Posts: 10Member

: : So do you think you can help me out?
: