a costume uses 5/6 yard of ribbon. you have 9 costumes to make. how many yards of ribbon fo you need?
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now, we know 7 of those angles are already 835°, so the last one must be 1080 - 835 = 245°.
now, we know 7 of those angles are already 835°, so the last one must be 1080 - 835 = 245°.