Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Mathematics (https://www.askmehelpdesk.com/forumdisplay.php?f=199)
-   -   Prove that the area of a circle is half the product of its circumference and radius (https://www.askmehelpdesk.com/showthread.php?t=711863)

  • Oct 25, 2012, 11:11 PM
    xwagat
    Prove that the area of a circle is half the product of its circumference and radius
    To prove that the area of a circle is half the product of its circumference and radius with the help of practical
  • Oct 26, 2012, 05:44 AM
    ebaines
    What level of mathematics is this for? If you're in high school geometry I would suggest one technique, which relies on knowing that the area of a circles is . If you're in a calculus class I would suggest a different approach that derives the value for the area from basic principles.
  • Oct 27, 2012, 02:01 AM
    RPVega
    Area of a circle = A = (pi) * (r ^ 2)
    Circumference of a circle = C = 2 * (pi) * r
    A = (1/2) * C * r = (1/2) * (2 * (pi) * r ) * r
    A = (pi) * (r ^ 2) Q.E.D.

    "Q.E.D." stands for "quod erat demonstrandum," which is Latin
    for "which was to be demonstrated." The acronym "Q.E.D." is used
    often in math textbooks. :)

  • All times are GMT -7. The time now is 09:14 PM.