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So let the angle be x

so its complimentary is 90 - x 

so according to question    3\frac{1}{2}x=90-x

⇒  \frac{9}{2}x = 90

⇒ x = 20° ANSWER

2 5 2
hope this helps
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try the next ques that i have posted plc
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Let angle be x



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