It probably isn't pir^2... Anybody know?
4 454Casull Member Joined 2004 2004-06-21 8:57 pm #1 2004-06-21 8:57 pm #1 It probably isn't pir^2... Anybody know? ••• More options Share roddyama Ex-Moderator Joined 2002 2004-06-21 9:06 pm #2 2004-06-21 9:06 pm #2 Usually the diameter is measured as the actual cone diameter plus half of the surround on both sides. Then it's pi X (dia/2)^2 ••• More options Share Ron E Member Joined 2002 2004-06-21 9:51 pm #3 2004-06-21 9:51 pm #3 Yes, it is: Sd = pi * radius ^2 or, since radius = Dia/2 Sd = pi*(Dia/2)^2 = (pi*(Dia)^2)/4 As Rodd says, you should include half of the surround. The easiest way to measure diameter is to measure across the diameter on opposite sides of the surround. See picture. Attachments drawing2.gif 9.4 KB · Views: 278 ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link
roddyama Ex-Moderator Joined 2002 2004-06-21 9:06 pm #2 2004-06-21 9:06 pm #2 Usually the diameter is measured as the actual cone diameter plus half of the surround on both sides. Then it's pi X (dia/2)^2 ••• More options Share Ron E Member Joined 2002 2004-06-21 9:51 pm #3 2004-06-21 9:51 pm #3 Yes, it is: Sd = pi * radius ^2 or, since radius = Dia/2 Sd = pi*(Dia/2)^2 = (pi*(Dia)^2)/4 As Rodd says, you should include half of the surround. The easiest way to measure diameter is to measure across the diameter on opposite sides of the surround. See picture. Attachments drawing2.gif 9.4 KB · Views: 278 ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Usually the diameter is measured as the actual cone diameter plus half of the surround on both sides. Then it's pi X (dia/2)^2
Ron E Member Joined 2002 2004-06-21 9:51 pm #3 2004-06-21 9:51 pm #3 Yes, it is: Sd = pi * radius ^2 or, since radius = Dia/2 Sd = pi*(Dia/2)^2 = (pi*(Dia)^2)/4 As Rodd says, you should include half of the surround. The easiest way to measure diameter is to measure across the diameter on opposite sides of the surround. See picture. Attachments drawing2.gif 9.4 KB · Views: 278 ••• More options Share
Yes, it is: Sd = pi * radius ^2 or, since radius = Dia/2 Sd = pi*(Dia/2)^2 = (pi*(Dia)^2)/4 As Rodd says, you should include half of the surround. The easiest way to measure diameter is to measure across the diameter on opposite sides of the surround. See picture.
