Basic numeracy-concepts-of-geometry

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Basic numeracy, concepts of geometry

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Basic numeracy-concepts-of-geometry

  1. 1. Click Here to Join Online Coaching Click Here www.upscportal.com Basic Numeracy
  2. 2. www.upscportal.com Click Here to Join Online Coaching Click Here Point A point is defined by its position. It has no length, width or thickness. A straight line joining two points is the shortest distance between them. Three or more points are said to be collinear, if there is a line which contains all of them. Line A line is defined by its length and has no breadth. It has length units. (metre, foot, centimetre kilometre, etc.). A line contains infinite points. Through a given point, there pass infinite lines. One and only one straight line passes through two distinct points. Three or more lines are said to be concurrent, if they pass, through one point and that point is called the point of concurrence. Two lines are said to be intersecting lines, if they have a common point. Concept of Geometry
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  14. 14. www.upscportal.com Click Here to Join Online Coaching Click Here Perpendicular Bisector It is the line passing through the mid point of the side of a triangle and perpendicular to it. All the three perpendicular bisectors of a triangle meet at a point called the circumcentre of the triangle. The circumcentre is the centre of a circle which can be perfectly circumscribed about the triangle. The circumradius = PC = QC = RC and Ð QCR = 2 Ð P. In D PQR the angle bisectors meet at circumcentre C. Also, D, E and F are mid points of QR, RP and PQ respectively.
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