The area of a circle is calculated by multiplying pi by r2. Where r = the radius of the circle.
IF we use 3.1416 as our value of pi, this means that a circle with a radius of 1 inch has an area of 3.1416 square inches. Rounding this to one decimal place gives us 3.1 square inches.
Other radius - area ratios are
2 .......... 12.5665 - rounded = 12.6
3 .......... 28.2744 - rounded = 28.3
4 .......... 50.2656 - rounded = 50.3
5 .......... 78.54 - - - rounded = 78.5
6 ......... 113.0976 - rounded = 113.1
7 ......... 153.9384 - rounded = 153.9
8 ......... 201.0624 - rounded = 201.1
9 ......... 254.4696 - rounded = 254.5
10 ....... 314.16 - - - rounded = 314.2
Hint: to multiply a decimal amount by 10, all you do is move the point one place to the right... 0.7 x 10 = 7
The square root of 3 is 1.73205081* * * * *or -1.732050812.23606798
15. (or 1 depending on what you mean in the question)I thought it would prove difficult to answer this but it turns out there are websites which do list this many digits! One of which suggests that the 1 millionth digit of pi is 1. However, I believe it is referring to the 1 millionth digit after the decimal point.So if we include the "3" at the start of pi (before the decimal point), and we should if we are talking digits, then we would want the digit one place before this, which apparently is 5.Please note: I have looked at 2 independent sources for this answer but still can not vouch 100% for their accuracy.
A place where two rivers join.
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Almost any calculator can calculate square roots. Have the calculator calculate it. Then round the result to 1 decimal place.
There are several ways to calculate uncertainty. You can round a decimal place to the same place as an uncertainty, put the uncertainty in proper form, or calculate uncertainty from a measurement.
33.1830724 or 33.2 square cm to one decimal place
The circumference is equal to r2*pie or 38.5 inchesAnother answer:Circumference of a circle = 2*pi*radius or pi*diameterCircumference = 7*pi = 21.99114858 or 22.0 inches to one decimal place.
Area of circle: pi*5^2 = 78.5 square cm rounded to 1 decimal place
The easiest way is to shift the decimal point one place to the left.
You can do it in your head. All you do is move the decimal point one place left...
The radius of the circle is 9.772 cm rounded to 3 decimal place and the circumference of the circle is 2*pi*9.772 = 61.399 cm rounded to 3 decimal places
Area of a circle = pi x radius2 The area of a circle with radius 3 cm = pi x 32 = 28.27433388 = 28.3 cm2 (1 decimal place)
decimal place
calculate 10%, merely move the decimal point over one place. answer 154.832.
If the circle has a diameter (all the way across) of 15 feet,then its area is 176.7 square feet, rounded to one decimal place.