There are no gloves alone that are rated for -30 degree use, but there are multiple pairs, that in addition to the use of a liner will be usable at -30 degrees.
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Use a protractor to draw a 55 degree angle and indicate that the angle needs to be measured once around the circle and then some.
Use and rearrange the sine ratio: 30*sin(45) = 21.21320344 units
Unless you are ready for some complicated trigonometry, I would suggest that you use a protractor and draw a 50 degree angle BEYOND a right angle.
put the protractor on the vertex and look up at the degree's and look belowacute angle =has a measure between 0 degree's and 90 degree'sright angle =has a measure of 90 degree'sobtuse angle = has a measure between 90 degree's and 180 degree'sstraight angle = has a measure of 180 degree'sthat's how you use a protractor to measure angles.
Use a protractor. There is no easy fix. Use a protractor. There is no easy fix. Use a protractor. There is no easy fix. Use a protractor. There is no easy fix.