Question 462456
the acute angles of a right triangle are in the ratio 4:5. How large is the triangle's largest exterior angle?
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4:5 is the same as 4x:5x 
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Equation:
4x + 5x = 90 degrees
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9x = 90
x = 10
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one of the angles is 4x = 40 degrees
the other is x = 50 degrees.
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Cheers,
Stan H.
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