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# Year 12 Non Right An

TermDefinition
sine opposite/hypotenuse
compass bearing a direction given stating the angle either side of north or south, such as S60°E
true bearing a direction given by measuring the angle clockwise from north such as 120°T
radial survey a radial survey involves measuring the angles between radial lines drawn from a central point in the direction of the corners of the land, and Measuring the lengths of the radial lines,
angle of elevation the angle of elevation is the angle measured upwards from the horizontal
angle of depression the angle of depression is the angle measured downwards from the horizontal
one degree equals 60 minutes
one minute equals 60 seconds
hypotenuse the side opposite the right angle
area of a triangle half the product of the two sides multiplied by the sine of the angle between the two sides
sine rule used in a non right angled triangle given two sides and an angle opposite one of the given sides or two angles and one side
cosine rule used where three sides and one angle are involved
Created by: wdobson