NCERT Class 8 Maths Chapter 4 Practical Geometry Exercise 4.2


Chapter 4 Practical Geometry Exercise 4.2

Question 1: Construct the following quadrilaterals.
i) Quadrilateral LIFT
LI = 4 cm
IF = 3 cm
TL = 2.5 cm
LF = 4.5 cm
IT = 4 cm
ii) Quadrilateral GOLD
OL = 7.5 cm
GL = 6 cm
GD = 6 cm
LD = 5 cm
OD = 10 cm
iii) Rhombus BEND
BN = 5.6 cm
DE = 6.5 cm
Answer:

i)
Given
Quadrilateral LIFT
LI = 4 cm
IF = 3 cm
TL = 2.5 cm
LF = 4.5 cm
IT = 4 cm

Rough figure

i) Rough figure


Actual figure

i) Actual figure


Steps of Construction
1. Draw line segment LF = 4.5 cm.
2. With L as centre, radius 4 cm draw an arc.
3. With F as radius, radius 3 cm draw an arc to cut previous arc at I.
4. With L as centre, radius 2.5 cm draw an arc.
5. With I as centre, radius 4 cm draw an arc to cut previous arc at T.
6. Join LT, LI, TF, FT.
7. LIFT is the required quadrilateral.

ii)
Given
Quadrilateral GOLD
OL = 7.5 cm
GL = 6 cm
GD = 6 cm
LD = 5 cm
OD = 10 cm

Rough figure

ii) Rough figure


Actual figure

ii) Actual figure


Steps of Construction
1. Draw line segment OD = 10 cm.
2. With O as centre, radius 7.5 cm draw an arc.
3. With D as centre, radius 5 cm draw an arc to cut previous arc at L.
4. With D as centre, radius 6 cm draw an arc.
5. With L as centre, radius 6 cm draw an arc to cut the previous arc at G.
6. Join OL, DL, OG, DG.
7. GOLD is the required quadrilateral.

iii)
Given
Rhombus BEND
BN = 5.6 cm
DE = 6.5 cm

Rough figure

iii) Rough figure


Actual figure

iii) Actual figure


Steps of Construction
1. Draw line segment DE = 6.5 cm.
2. Draw the perpendicular bisector of DE to intersect DE at O (O is the midpoint of DE).
3. With O as the centre and radius = 2.8 cm, draw arcs on either sides to intersect the perpendicular bisector at B and N.
4. Join BD, BE, DN, EN.
5. BEND is the required rhombus.

No comments:

Post a Comment

Also read!

Click on any of the below text for additional links:

Class 6

Class 6 Computer Kips Solutions
Class 6 Gul Mohar English Solutions
→ Class 6 Map Pointing Solutions
Class 6 NCERT Civics Solutions
Class 6 NCERT Geography Solutions
Class 6 NCERT History Solutions
Class 6 NCERT Maths Solutions
Class 6 NCERT Science Solutions

Class 7

Class 7 Computer Kips Solutions
Class 7 Gul Mohar English Solutions
English Grammar Class 7
English Writing Skills Class 7
Class 7 Map Pointing Solutions
Class 7 NCERT Civics Solutions
Class 7 NCERT Civics Notes
Class 7 NCERT Civics Extra Questions
Class 7 NCERT Geography Solutions
Class 7 NCERT Geography Notes
Class 7 NCERT Geography Extra Questions
Class 7 NCERT History Solutions
Class 7 NCERT History Notes
Class 7 NCERT History Extra Questions
Class 7 NCERT Maths Solutions
Class 7 NCERT Science Solutions
Class 7 NCERT Science Notes
Class 7 NCERT Science Extra Questions

Class 8

Class 8 Kips Artificial Intelligence Solutions
Class 8 Gul Mohar English Solutions
English Grammar Class 8
English Writing Skills Class 8
Class 8 Map Pointing Solutions
Class 8 NCERT Civics Solutions
Class 8 NCERT Civics Notes
Class 8 NCERT Civics Extra Questions
Class 8 NCERT Geography Solutions
Class 8 NCERT Geography Notes
Class 8 NCERT Geography Extra Questions
Class 8 NCERT History Solutions
Class 8 NCERT History Notes
Class 8 NCERT History Extra Questions
Class 8 NCERT Maths Solutions
Class 8 NCERT Science Solutions
Class 8 NCERT Science Notes
Class 8 NCERT Science Extra Questions
Class 8 NCERT Science Exemplar
Class 8 NCERT Science MCQs

Class 9

Class 9 Kips Artificial Intelligence Solutions
Class 9 Map Pointing Solutions
Class 9 NCERT Civics Solutions
Class 9 NCERT Geography Solutions
Class 9 NCERT History Solutions
Class 9 NCERT Maths Solutions
Class 9 NCERT Science Solutions

Class 10

Class 10 Kips Artificial Intelligence Solutions
Class 10 NCERT English Solutions
→ Class 10 Map Pointing Solutions
Class 10 NCERT Civics Solutions
Class 10 NCERT Civics Notes
Class 10 NCERT Civics Extra Questions
Class 10 NCERT Geography Solutions
Class 10 NCERT Geography Notes
Class 10 NCERT Geography Extra Questions
Class 10 NCERT History Solutions
→ Class 10 NCERT History Notes
Class 10 NCERT History Extra Questions
Class 10 NCERT Maths Solutions
Class 10 NCERT Science Solutions
Class 10 NCERT Science Notes
Class 10 NCERT Science Extra Questions

Computer Languages

Python Basics

Extra Activities

Extra Activities

Extra Knowledge

Extra Information
General Knowledge
Historical Places in India
Latest technology
Physical Sciences
Facts

• Mathematics quick links
Mathematical Terms
Maths Tricks

Home Top