niyag2gi
19.03.2021 •
Mathematics
I need help with geometry
Solved
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Ответ:
15π m
Step-by-step explanation:
Short arc AC is 60°, so long arc ADC will be 360°-60° = 300°. As a fraction of the circumference of the circle it is
(300°/360°)C = 5/6C
where C is the circumference:
C = 2πr = 2π(9 m) = 18π m
Then the arc length is ...
arc ADC = (5/6)(18π m) = 15π m