An iron rod is bent to from a right angled triangle with one of the acute angle 30°. If the slide opposite to30° is 1 m long, Find the length of rod.
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Answer:
hypotenuse = 1 m
sin 30° = perp/hypo
=>1/2 =perp/1
=>perp = 1/2
base=sqrt (hypo^2-perp^2)
=1-1/4=3/4
length of rod = perimeter =1+1/2+3/4=2.25
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