3 way construction

A photographic camera consists of a converging lens system at least one end of a box and a light sensitive film at the other end, a focusing device for adjusting the distance of the lens from the film and an exposure arrangement which provides the correct exposure. The object is placed in such a h..

To construct angles of 60 o , 120 o and 30 o..

To construct angles of 60 o , 120 o and 30 o (i) Draw a line AB. (ii) With A as centre, taking any suitable radius, draw an arc which cuts AB at P. (iii) With P as centre and the same radius, cut the arc at Q. (iv) From Q, with the same radius, cut the arc at R. (v) Join AQ and produce it..

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..

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 ..

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 ..

Construction - 13 - To construct an isosceles when altitude CD to the base AB is 2 cm and the vertical angle C = 90 o (1) Take any straight line XY and at any point D on it, draw cutting off DC = 2 cm. Join DC. (2) At C, on either side of DC, construct angles DCA and D..

To construct an isosceles when altitude CD to the base AB is 2 cm and the vertical angle C = 90 o (1) Take any straight line XY and at any point D on it, draw cutting off DC = 2 cm. Join DC. (2) At C, on either side of DC, construct angles DCA and DCB, respectively, each being e..

). At Y, make an angle of 30 o ( ). Produce their arms to meet at A. (3) Draw perpendicular bisectors of AX and AY to meet XY at B and C. (4) Join AB and AC. Then is the required triangl..

>km. The Milky Way is about 10 5 light years thick at the central bulge and much flatter towards the edges of the disk. The thick center represents a relatively high concentration of the stars at the center. Our solar system is located in the outskirts of the galaxy, about 25 x 10 3h..