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In a right triangle ,one of the acute angles is four times the other. Find its measure.

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In a right triangle ,one of the acute angles is four times the other. Find its measure.
A. `68^(@)`
B. `84^(@)`
C. `80^(@)`
D. `72^(@)`
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Correct Answer - D
Let the required measure be `x^(@)`.
Measure of the other acute angle. `=((x)/(4))^(@)`
`x^(@)+((x)/(4))^(@)+90^(@)=180^(@)`
`x^(@)=72^(@)`
Hence, the correct option is (d).
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