simple construction introduction

Introduction - Geometrical figures help us to understand various geometrical concepts. When we prove geometrical propositions by logical reasoning, we draw only a rough figure and we do not need to take accurate measurements but geometrical constructions have to be drawn accurat..

Geometrical figures help us to understand various geometrical concepts. When we prove geometrical propositions by logical reasoning, we draw only a rough figure and we do not need to take accurate measurements but geometrical constructions have to be drawn accurately to the given me..

Summary - Construction of an angle equal to a given angle. Bisecting an angle To construct angles 60 o , 120 o and 30 o . To construct angles 90 o , 45 o and 135 o . To construct angles 75 o and 105 o . Drawing the perpendicular bisector of line segment AB. h..

A simple D.C. generator consists of a rectangular coil ABCD which can be rotated rapidly between the poles N and S of a strong horse-shoe type magnet M. The generator coil is made of a large number of turns of insulated copper wire. The two ends of the coil are connected to the two copper..

To construct an angle equal to a given angle and a point Q on a line PQ. An angle equal to at Q. (i) With B as centre and any suitable radius draw an arc to cut AB at D and BC at E. (ii) With Q as centre and the same radius, draw an arc to cut PQ at ..

Given the perimeter and the base angles, to construct the triangle In the perimeter = 7.5 cm, and (1) Draw XY = 7.5 cm. (2) At X make an angle of..

To construct angles of 75 o and 105 o (i) Draw AB. Make any point O on it. (ii) With O as centre, draw an arc which cuts AB at B. (iii) With B as centre and same radius, cut an arc at Q and from Q with same radius, cut the arc at R. (iv) Join OQ, OR. and (v) Bisect by constructing..

To construct a triangle when the sum of two sides, the remaining side and the angle between them are given (We assume that the given angle can be constructed with ruler and compass alone) In BC = 3.8 cm, and AB + AC = 6.5 cm (1) Draw BC = 3.8 cm and at B make (2) With B as centr..

To construct a right angled D ABC when hypotenuse AC = 4 cm and hypotenuse and one acute angle are given (1) Draw a straight line AC = 4cm. (2) Taking OC as diameter, draw a semi circle on AC. (3) At A, construct meeting the semicircle at B. Join BC. (4) Then D ABC is the requir..

To construct a line parallel to a given line through a given point A line AB and a point O. It is required to construct a line parallel to AB through O. (i) Draw any line through O to cut AB at C. (ii) At O, construct (iii) Join PO and produce it to Q. (iv) Then PQ is ..