kodyharris117
04.02.2020 •
Mathematics
How to find area? will give..
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Ответ:
Step-by-step explanation:
A=πr2
Circumference = 2πr
20π = 2πr
r=10
π=3.14
A=3.14 * 10^2
=314 cm^2
Ответ:
180(n-2)
(n is the number of sides)
180 (5 - 2)
180 (3)
540
Now add all the angles and set them equal to 540.
87 + 105 + 135 + 92 + x = 540
419 + x = 540
x = 121
Hope this helps :)