Lower Bound and Upper Bound of Perimeter

igcse,mathematics,Cambridge,examination,past papers,limits of accuracy,rectangles,perimeter,plane figures,mensuration,geometry,lower bound,upper bound
This item is taken from IGCSE Mathematics (0580) Paper 23 of May/June 2014.

To deal with this item, let us summarize the details of the problem:
   (a) Syllabus area: Geometry
   (b) Specific topic: Perimeter of Plane Figures,Limits of Accuracy

   (c) Formula Needed:

igcse,mathematics,Cambridge,examination,past papers,limits of accuracy,rectangles,perimeter,plane figures,mensuration,geometry,lower bound,upper bound
Let us start with the lower bound and upper bound of the length of the rectangle.
igcse,mathematics,Cambridge,examination,past papers,limits of accuracy,rectangles,perimeter,plane figures,mensuration,geometry,lower bound,upper bound
Now, let us find the lower and upper bounds of the width of the rectangle.
igcse,mathematics,Cambridge,examination,past papers,limits of accuracy,rectangles,perimeter,plane figures,mensuration,geometry,lower bound,upper bound

To find the upper bound of the perimeter of the rectangle, calculate using the upper bounds of its length and width.
To find the upper bound of the perimeter of the rectangle, calculate using the upper bounds of its length and width.
To find the lower bound of the perimeter of the rectangle, calculate using the lower bounds of its length and width.
To find the upper bound of the perimeter of the rectangle, calculate using the upper bounds of its length and width.
Therefore, the upper and lower bounds of the perimeter of the rectangle are 427.8 cm and 427.4 cm, respectively.

-------------------------------------------------------------------------------------------------------------- 
Your comments and suggestions are welcome here. Write them in the comment box below.

Thank you and God bless!

9 comments:

Anonymous said...

thanks

Anonymous said...

thank you so much

Unknown said...

explained it better than my maths teacher

Anonymous said...

God bless the person thank you so much

Anonymous said...

YAY this explains so much!! thanks!!!

Anonymous said...

This is so clear to me now thx

Unknown said...

thanks

Unknown said...

i always do it as 2(l+b) though

Unknown said...

explained it better than my maths teacher

Post a Comment