Results 1 to 3 of 3

Math Help - How to find total area of figure?

  1. #1
    Junior Member
    Joined
    Feb 2010
    Posts
    35

    Question How to find total area of figure?

    what are the steps in solving this?
    the formula?

    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member
    Joined
    Oct 2009
    From
    Brisbane
    Posts
    311
    Thanks
    2
    Quote Originally Posted by benjixbunn View Post
    what are the steps in solving this?
    the formula?

    You should know the formula for the area of a circle and a rectangle. You don't need another formula for this compound shape. Break it upinto a rectangle (you have the length amd breadth) and two semicircles (or one circle)- you can easily work out the radius.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member lanierms's Avatar
    Joined
    May 2010
    From
    Seoul, South Korea
    Posts
    50
    First you have to break it into one rectangle in the middle and two semicircles on each side.

    The area of the rectangle is

    6in\times10in=60in^2

    The area of each semicircle is

    \frac{3^2\pi}{2}in^2=\frac{9\pi}{2}in^2
    Since there are two semicircles,

    \frac{9\pi}{2}in^2\times2=9\pi in^2

    Pi's approximate value is 3.14, so

    60in^2+9\pi in^2 \\ =60in^2+9(3.14)in^2\\<br />
=60in^2+28.26in^2\\=88.26in^2\\ \approx 88.3in^2
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] Find total surface area of cone...
    Posted in the Geometry Forum
    Replies: 2
    Last Post: October 2nd 2011, 11:36 AM
  2. Replies: 2
    Last Post: April 2nd 2011, 02:08 AM
  3. how to find area of figure if given Linear Operator Matrix
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: March 31st 2009, 02:28 AM
  4. Replies: 6
    Last Post: May 3rd 2008, 07:50 PM
  5. Replies: 4
    Last Post: November 28th 2006, 11:08 AM

Search Tags


/mathhelpforum @mathhelpforum