Hi David and all, The formulas mention finding the square root. Since my talking calculater does not have the square root function built in I use this technique. Hope my math is correct and that it is written well enough. Lenny The perfect squares are obvious for example 3 squared is 9, 4 squared is 16, 5 squared is 25
If the number is not a perfect square this is one fairly easy way to estimate the root 1. First find the closest squares that surround your number. 2. Divide your number by one of those square roots. 3. Calculate the average of the result of step 2 and the root. 4. By using the value calculated in step 3, repeat steps 2 and 3 until you have an accurate number. Problem: Calculate the square root of 10. 1. Locate the two closest surrounding perfect squares. Solution: 1. 3squared = 9 and 4squared = 16, the surrounding perfect squares. 2. Divide 10 by 3. 10/3 = 3.3333, round off to 3.33. 3. Average 3.33 and 3. (3.33 + 3)/2 = 3.165 Repeat step 2: 10/3.165 = 3.159 Repeat step 3: Average 3.159 and 3.165. (3.159 + 3.165)/2 = 3.162 Answer: 3.1623 squared equal to 10? 3.162 x 3.162 = 9.998 If this is not accurate enough for you, you repeat steps 2 and 3. ----- Original Message ----- From: "David Ferrin" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, April 28, 2007 12:33 AM Subject: Re: [BlindHandyMan] calculating the area of a triangle Well I don't claim to understand either of these formulas very much but I have combined both of these posts in to a single file. The first method uses the vertical sides being equal where the second none of the sides are equal at all. I invite you guys to check out my handy work, but I didn't change any of the mathematical information. http://www.jaws-users.com/handyman/CalculatingTheAreaOfATriangle.html David Ferrin Never purchase the first version of anything. This message brought to you by Windows Vista. Smart Computing March 2007 ----- Original Message ----- From: "Michael Baldwin" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, April 27, 2007 10:35 PM Subject: RE: [BlindHandyMan] calculating the area of a triangle David, There are two methods for calculating the area of a triangle that I know of. First method works best if it is a right triangle, one angle is a 90 degree angle. Area equals base times the height divided by two. A triangle with a base of 3 inches, height of 4 inches would be A=(3*4)/2 A=12/2 A=6 The area would be 6 square inches. The second method works better if you do not know the height, or do not feel like figuring the height. First figure up the perimeter of the triangle. This example we will use a triangle with side A 15 inches, side B 10 inches, and side C 7 inches. Perimeter equals A plus B plus C P=15+10+7 P=32 Now for the area Area equals the square route of the perimeter divided by 2 times the perimeter divided by 2 minus side A times the perimeter divided by 2 minus side B times the perimeter divided by 2 minus side c A=sqt((32/2)((32/2)-15)((32/2)-10)((32/2)-7)) A=sqt(16(16-15)(16-10)(16-7)) A=sqt(16*1*6*9) A=sqt(864) A=29.39 square inches. Michael -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of David Ferrin Sent: Friday, April 27, 2007 20:24 To: [email protected] Subject: [BlindHandyMan] calculating the area of a triangle Would somebody please try posting this information again but in English this time? I'd like to put it up on the web, unfortunately never having trigonometry none of it made any sense to me enough to code in an HTML file at least. Also please use an example to explain the formula. David Ferrin Never purchase the first version of anything. 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