A catalogue of scientific equipment states that the lens of a particular telescope has a circumference of 6.28 metres. What is the lens's radius?
Use 3.14 for .
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Approximately
3.14
Explanation:
The formula for circumference of a circle with radius r
is
2x3.14xr
.
The formula for the area of a circle with radius r
is
πr2
So the radius of our circle is
6.28/2x3.14 = 1
and its area is
3.14xr2
3.14x1x1
=3.14
3.14
Explanation:
The formula for circumference of a circle with radius r
is
2x3.14xr
.
The formula for the area of a circle with radius r
is
πr2
So the radius of our circle is
6.28/2x3.14 = 1
and its area is
3.14xr2
3.14x1x1
=3.14
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