Chapter 17 Constructions RD Sharma Solutions Exercise 17.1 Class 9 Maths
Chapter Name  RD Sharma Chapter 17 Constructions Exercise 17.1 
Book Name  RD Sharma Mathematics for Class 10 
Other Exercises 

Related Study  NCERT Solutions for Class 10 Maths 
Exercise 17.1 Solutions
1. Draw a line segment of length 8.6 cm. Bisect it and measure the length of each part.
Solution
Steps of construction :
 Draw a line segment AB of 8.6 cm
 With center A and radius more than , draw arcs, one on each side of AB
 With center B and same radius, draw arcs cutting the previous arcs at P and Q respectively
 Join PQ
∴ AC = BC = 4.3 cm
2. Draw a line segment AB of length 5.8 cm. Draw the perpendicular bisector of this line segment.
Solution
Steps of construction :
 Draw a line segment AB of 5.8 cm
 With center A and radius more than 1/2 AB, draw arcs with one on each side of AB
 With center B and same radius draw arcs cutting the previous arcs at P and Q respectively.
 Join PQ
3. Draw a circle with centre at point O and radius 5 cm. Draw its chord AB, draw the perpendicular bisector of line segment AB. Does it pass through the centre of the circle ?
Solution
Steps of construction :
 With center O and radius 5cm draw a circle
 Draw a chord AB.
 With center A and radius more than 1/2 AB, draw arcs one on each side of
 With center B and same radius draw arcs cutting previous arcs at P and Q respectively.
 Join PQ
∴ Yes perpendicular bisector PQ of AB passes through center of the circle.
4. Draw a circle with centre at point O. Draw its two chords AB and CD such that AB is not
parallel to CD. Draw the perpendicular bisectors of AB and CD. At what point do they
intersect?
Solution
Steps of construction :
 With center O and any radius, draw a circle
 Draw two chords AB and CD.
 With center A and radius more than 1/2 AB, draw arcs, one on each side of AB
 With center B and same radius draw arcs cutting previous arcs at P and Q respectively.
 Join PQ
 With center D and radius more than 1/2 DC. draw arcs, one on each side of DC
 With center C and same radius, draw arcs cutting previous arcs at R and S respectively
 Join RS
Both perpendicular bisector PQ and RS intersect each other at the center O of the circle.
5. Draw a line segment of length 10cm and bisect it. Further bisect one of the equal parts and measure its length.
Solution
Steps of construction :
 Draw line segment AB of 10 cm
 With center A and radius more than 1/2AB, draw arcs once on each side of AB
 With center B and same radius draw arcs cutting previous arcs at P and Q respectively.
 Join PQ and which intersect AB at C
 With center A and radius more than 1/2 AC, drawing on each side of AC.
 With center C and same radius, draw arcs cutting previous arcs at R and S respectively.
 Join RS and which intersect AC at b.
∴ AD = 2.5 cm.
6. Draw a line segment AB and bisect it. Bisect one of the equal parts to obtain a line segment of length 1/2 (AB).
Solution
Steps of construction :
 Draw a line segment AB
 With center A and radius more than 1/2 AB, draw arcs one on each side of AB
 With center B and same radius draw arcs cutting previous arcs at P and Q respectively.
 Join PQ and which intersect AB at C.
 With center A and radius more than 1/2 AC, draw arcs, one on each side of AC.
 With center C and same radius, draw arcs cutting previous arcs at R and S respectively.
 Join RS and which intersect AC at D
∴ AD = 1/4 AB.
7. Draw a line segment AB and by ruler and compasses 1 obtain a lien segment of length 3/4 AB.
Solution
Steps of construction :
 Draw a line segment AB
 With center A and radius more than 1/2 AB , draw arcs one on each side of AB.
 With center B and same radius draw arcs cutting previous arcs at P and Q respectively.
 Join PQ and which intersect AB at C
 With center C and radius more than 1/2 CB, draw arcs, one on each side of CB.
 With center B and same radius, draw arcs cutting previous arcs at R and S respectively.
 Join RS and which intersect CB at D
∴ AD = 3/4 AB