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des4273
05.01.2020 •
Mathematics
What is the area of a sector with a central angle of 108 degrees and a diameter of 21.2 cm?
use 3.14 for it and round your final answer to the nearest hundredth.
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Ответ:
Step-by-step explanation:
step 1
Find the area of the circle
The area of the circle is
we have
substitute
step 2
Find the area of a sector
Remember that
The area of the circle subtends a central angle of 360 degrees
so
using proportion
Find out the area of a sector with a central angle of 108 degrees
assume
substitute
Ответ:
2b is what i got