how to construct an angle of 67 1/2 using compasses and ruler

very much easy.... 

67 1/2 is 135 degree.

So by easy method , Just bisect between 90 degree and 180 degree. You will get 135 degree or (67 1/2 )!!

Easy.. Or u can bisect between 120 degree and 150 degree!! 

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just bisect the angles of 90 degree and 45 degree.

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  • is 671/2 and 135 degree same ??????
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how to construct 67 1/2 degree angle with compass
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Take a ruler and a compass and  draw a semicircle.

Put the needle of compass on end point of curve in semicircle and draw an arc  over the curve . 
​ From the point of intersection of arcs,draw another arc over the curve.  From the point of intersections of arcs ,draw an arc from each in such a way so the arcs intersect and connect the point with  centre of  line of semicircle and get right angle. Draw 2  intersecting arcs  from one arm's of angle 90 degree's end   in semicircle in direction of obtuse angles  and another from other end of curved line and creat 135 degree angle  and biscect it .
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CONSTRUCT 135 DEGREE ANGLE AND BISECT IT  BECAUSE 67.5 OR 67  1/2 = 135/2
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Just bisect the angle of 90 degree and 45 degree
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