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luda_lava [24]
3 years ago
10

Help me please and thank you

Mathematics
1 answer:
NeTakaya3 years ago
5 0

Answer:

use formula

area =1/4*π*d^2

81π=1/4*π*d^2(here two pie gets cancel)

81=1/4*d^2

81*4=d^2

\sqrt{324}=d

18=d

Step-by-step explanation:

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