Knownothing
13.06.2020 •
Mathematics
Urgent!
The measure of central angle QRS is
8 TT
9
radians.
What is the area of the shaded sector?
361 units2
721 units2
1441 units2
3241 units2
Solved
Show answers
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Ответ:
c. 144π units²
Step-by-step explanation:
In the picture attached, the circle is shown.
Data
The measure of central angle QRS is: 8π/9 radiansradius (r): 18 unitsArea of the circle = π*r² = π*18² = 324π square units
The area of the circle is proportional to angle 2π radians. Therefore:
324π square units / shaded area = 2π radians / (8π/9 radians)
shaded area = (8π/9)/(2π)*324π
shaded area = (4/9)*324π
shaded area = 144π square units
Ответ:
'The leangth of the shortcut is: '
guessing- '75'
Hope this helps!