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Bearings and Loci
28/06/2022
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Beanings and Loci Compass NW Sw NE PISO 30° SE E 30% compass describes locations - another method is using bearings BEARING-angle measured clockwise from North direction in 3 digib e.g. 035 Bearings e.g. Measure the bearing of city A from city B 1. Draw straight line between 2 poinb 2. Draw North line from City B 2.Sem N 275 e.g. HARDER- Measure bearing of ( from 0 when bearing of O from C is 330⁰ 1. Drawstraight line between 0 and C + fill in info you know (bearing of 330 from ( to 0), draw north line for both O and c. B 3300 Loci set of points meeting a certain desp description 3. Measure angle between North line and Straight line, clockwise Bearing would be: 275° 2. As angles around a point = 360° The other angle at C is 30° 360-330 30° 3. Two north lines are parellel so use angle fach about parallel lines to work out the rest → z (alternate) angles are equal 4. Then angies on straight line = 180° so beaning of C from O is ISOⓇ as 180-30= 150° LOCUS OF POINTS THAT LIE A SET DISTANCE AROUNO A POINT: A++ PERPENDICULAR ANGLE BISECTOR: BISECTOR: 4 1. Plase compass hip on point A or B, open compasses so that he pencil is open over half of the line AB. 2. Draw arc lengths on either side of the line Keep the compass the same distance but place The pointy end on the other point...
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Alternative transcript:
(A or B) and draw The arc lengths so that they cross over the previous 4. Join the two point they interest - this is the bisector 1. Place tip of compass on B, open compass reasonable distance and draw an arc / part of circle, so it crosses AB and BC 2. Put the point at the place where are intersects AB and draw arc lengths (Keep compous same distance apart as before) Repeat with BC, so le arc lengths cross AB's clvcs Connect point B and arc meeting point - This is bisector