One of the acute angles of a right triangle is $42 °$ . Find the other acute angle.

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Solution

In a right triangle one angle $= 90 °$
Given, acute angle $= 42 °$
Sum of the three angles $= 180 °$
Sum of the two given angles $= 90 ° + 42 ° = 132$
Hence, other acute angle $= 180 ° - 132 ° = 48 °$

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