If an angle of a parallelogram is two–third of it's adjacent angle, find the angles of the parallelogram
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sᴏ, ᴡᴇ ᴀssᴜᴍᴇ ᴛʜᴀᴛ ᴀɴɢʟᴇ "x" ɪs ᴛᴡᴏ-ᴛʜɪʀᴅ ᴏғ ᴀɴɢʟᴇ "ʏ" . ᴡᴇ ᴀʟsᴏ ᴋɴᴏᴡ ᴛʜᴀᴛ ᴛʜᴇ ᴀᴅᴊᴀᴄᴇɴᴛ sɪᴅᴇs ᴏғ ᴀ ᴘᴀʀᴀʟʟᴇʟᴏɢʀᴀᴍ ᴀʀᴇ sᴜᴘᴘʟᴇᴍᴇɴᴛᴀʀʏ. ɪᴛ ᴍᴇᴀɴs ᴛʜᴀᴛ ᴛʜᴇ sᴜᴍ ᴏғ ᴀᴅᴊᴀᴄᴇɴᴛ ᴀɴɢʟᴇs ɪs ᴇϙᴜᴀʟ ᴛᴏ 180. ʜᴇɴᴄᴇ, ᴛʜᴇ ᴀᴅᴊᴀᴄᴇɴᴛ ᴀɴɢʟᴇs ᴏғ ᴀ ᴘᴀʀᴀʟʟᴇʟᴏɢʀᴀᴍ ᴀʀᴇ 72° ᴀɴᴅ 108° .
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