Scales Of Cords
SCALES OF CORDS [caption id="attachment_4427" align="aligncenter" width="567"] scale of cords[/caption] CONSTRUCTION: Drew sector of a circle of 90 . with 'OA' radius. ('OA' any convenient distance ) Divide this angle into nine parts of 10 . each. Name as shown from the end 'a' upwards. From 'A' ass center, with cords of each angle as radius drew arcs downwards up to 'AO' line or it's extension and from a scale with proper labeling as shown. As card length is used to measure & construct different angle it is called the scale of cords. 1. Construct any triangle and measure its angles by using a scale of cords. CONSTRUCTION: First prepare the scale of cords for the problem. Then construct a triangle of given sides. (You are supposed to measure angles x,y and z) To measure angle at x: Take O-A distance in compass from cords scale and mark it on the lower side of the triangle as shown from corner...