how to measure an angle
please this is an emergency
Answers
Answer:
use a orotracter to measure angles from 0 degree to 180 degree
Answer:
If the angle is drawn to scale you can use a protractor to measure the angle. Otherwise there are some algebraic ways to find the measurement of an angle. If the angle is part of a right triangle you can use inverse trigonometry to find the measure of the angle provided you know the lengths of t least two sides. If the angle is part of any triangle, and you know the measures of the other two angles you can use the triangle sum theorem and subtract the sum of the two known angles from 180 degrees and the result is the measure of the third angle. If you know the measure of all three sides you can use the law of Cosines: c^2 = a^2 + b^2 - 2(a)(b)(cos C). Which when you take all the algebra steps becomes: inverse cosine of {[c^2 - (a^2 + b^2)]/[-2(a)(b)]}. Or if you know the length of a side opposite a known angle and another angle you can use law of sines.