Math Is Fun Forum

Mel

Guest

Help!

Ok it seems simple but i cant get the answer

An architects computer package draws the cross section of a shed on its screen by drawing the area bounded by the x-axis and the y-axis and the lines
x=2.4, 2y=6.8-x & 2y=x+4.4

If each unit on each axis represents 1 metre, calculate the area

So i know the answer is 6m² i just got figure out how i got there ok

Thannnnnksss =]

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: Help!

It’s quite straightforward, really. Plot the graphs to see what sort of the area you need to calculate. Determine the relevant points of intersection, and then calculate the area.

MathsIsFun

Administrator

Registered: 2005-01-21

Posts: 7,713

Re: Help!

You can plot the lines using this: Function Grapher and Calculator (you can plot 2 lines, so could see their intersection point, but to be accurate you should do some algebra to figure out the value, too)

Example: Plot of (6.8-x)/2 vs (x+4.4)/2

And figure out the are using this method: Area of Irregular Polygons

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"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman