You can use a protractor to find out.
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Multiply the percentage by 3.6
[100% = 360 degrees so n% = n*360/100 = n*3.6 degrees].
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67.5 degrees
Of what?
It depends on what "this measurement" refers to: the radius, circumference, length of arc with a known angle.
To find the measurement of the fourth angle in a quadrilateral when three angles are given, you can use the property that the sum of all angles in a quadrilateral is always 360 degrees. Given that the three angles are 90, 145, and 78 degrees, you can add these together and subtract the sum from 360 to find the measurement of the fourth angle. Therefore, the fourth angle would be 360 - (90 + 145 + 78) = 47 degrees.
The entire circumference has a central angle of 360 degrees. The arc is a fraction of the circumference. The fraction is (central angle) divided by (360). So the arc length is: (circumference) x (central angle) / (360) .