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nstacie40
10.03.2020 •
Mathematics
A wire 390 in. long is cut into two pieces. One piece is formed into a square and the other into a circle. If the two figures have the same area, what are the lengths of the two pieces of wire (to the nearest tenth of an inch)?
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Ответ:
Step-by-step explanation:
Below is an attachment containing the solution.
Ответ:
Step-by-step explanation:
Let x is the length of the square side.
We know: the two figures have the same area
<=>
= π
(r being radius)
<=> x =
r
perimeter square = 4x = 4*r*![\sqrt{II}](/tpl/images/0539/4818/51317.png)
perimeter circle = 2*r*π
<=> 390 = 4*r*
+ 2*r*π
<=> r = 29.16
=> perimeter square = 4*29.16*π
=> perimeter circle = 58.32π
Ответ:
D
Step-by-step explanation: