Update about.html

Metadata

Author: Gmac4247

about.html

@@ -198,25 +198,28 @@
 	},
 	{
 	"@type": "propertyValue", 
-	"name": "Paper stripe thickness",
+	"name": "Paper strip thickness",
 	"unitText": "mm",
 	"maxValue": 0.1
 	},
 	{
 	"@type": "propertyValue", 
-	"name": "Paper stripe length",
+	"name": "Paper strip length",
+	"description": "Based on the circumference=3.2diameter formula, the expected length of the paper strip with the approximate thickness of ~0.1 mm, wrapped around the 29 mm diameter coin is ~93.6 mm.",
 	"unitText": "mm",
 	"minValue": 93
 	},
 	{
 	"@type": "propertyValue",
 	"name": "Coin circumference",
+	"description": "The circumference of the coin is measured indirectly, through the length of the paper strip wrapped around it. The minValue is calculated by dividing the measured length of the paper strip by the combined diameter of the coin plus 2 layers of paper with a thickness of 0.1 mm, and multiplying the result by the diameter of the coin.",	
 	"unitText": "mm",
 	"minValue": 92.36,
 	"value": 92.8
 	},
 	{
-	"@type": "propertyValue", 
+	"@type": "propertyValue",
+	"description": "The margin of error is calculated from the difference between the theoretically accurate 92.8 mm circumference of the coin based on the circumference=3.2diameter formula, and the 92.36 mm result based on the circumference calculated from the length and the thickness of the paper strip.",
 	"name": "Margin of Error",
 	"unitText": "percent",
 	"maxValue": 0.5
@@ -480,7 +483,7 @@ <h2>I remembered the number 3.14 called the pi, but I was interested in the logi
 <br>
 Paper is flexible enough to wrap around them, but strong enough not to stretch. The thickness of the paper can be added to the diameter of the coin. It can be unwrapped and measured after straightening with minimal distortion. 
 <br>
-It doesn't matter if the ruler is not perfectly accurate. As long as its grading is consistent, and we're measuring the diameter of the object and the length of the paper with the same ruler, the results will be consistent.
+It doesn't matter if the ruler is not perfectly accurate, as long as its grading is consistent, and we're measuring the diameter of the object and the length of the paper with the same ruler, the results will be consistent.
 <br>
 At a circumference of 100 mm the difference between 3.2 and 3.14... is almost 2 mm. That is easy to see by naked eye.
 <br>