ᴛʜᴇ ᴛʜʀᴇᴇ ᴀɴɢʟᴇs ᴏғ ᴀ ᴛʀɪᴀɴɢʟᴇs ᴀʀᴇ ɪɴ ᴛʜᴇ ʀᴀᴛɪᴏ 1:2:3 . ғɪɴᴅ ᴛʜᴇ ᴀʟʟ ᴛʜᴇ ᴀɴɢʟᴇs ᴏғ ᴛʜᴇ ᴛʀɪᴀɴɢʟᴇs .
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the answer is 30, 60, 90
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Asmall source of light is 4 m below the surface of water of refractive index 5/3. in order to cut off all the light,
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