SOLUTION: How would I be able to determine 89 degrees using the simple 3-4-5 carpenter's method of measure? (60" = 90 degrees)

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Question 733743: How would I be able to determine 89 degrees using the simple 3-4-5 carpenter's method of measure? (60" = 90 degrees)
Answer by Alan3354(69443) About Me  (Show Source):
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How would I be able to determine 89 degrees using the simple 3-4-5 carpenter's method of measure? (60" = 90 degrees)
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You can measure a distance from the corner, eg, 60"
The longest side of the triangle can be calculated using the Cosine Law:
s%5E2+=+60%5E2+%2B+60%5E2+-+2%2A60%2A60%2Acos%2889%29
s%5E2+=+7200+-+125.657
s =~ 84.11"