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ᴀɴsᴡᴇʀ.
1) ᴛʜᴇʀᴇ ᴀʀᴇ ᴛᴏᴛᴀʟ ᴛʜʀᴇᴇ sᴜʀғᴀᴄᴇs ɪɴ ᴀ
ᴄʟᴏsᴇᴅ ʀɪɢʜᴛ ᴄʏʟɪɴᴅᴇʀ.
ᴏɴᴇ ʙᴏᴛᴛᴏᴍ ᴄɪʀᴄʟᴇ πʀ² ᴀɴᴅ ᴏɴᴇ ᴛᴏᴘ
ᴏɴᴇ ᴛᴏᴘ ᴄɪʀᴄʟᴇ πʀ² ᴀɴᴅ ʟᴀsᴛ
ʀᴇᴄᴛᴀɴɢᴜʟᴀʀ sʜᴇᴇᴛ ʟ×ʙ
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