NCERT Solutions for Class 8 Maths Chapter 4 Practical Geometry Ex 4.5
NCERT Solutions for Class
8 Maths Chapter 4
Practical Geometry Ex 4.5 are the part of NCERT Solutions for Class 8 Maths.
Here you can find the NCERT Solutions for Class 8 Maths Chapter 4 Practical Geometry Ex
4.5.
Draw the following:
Ex 4.5 Class 8 Maths Question 1.
The square READ with RE = 5.1 cm.Solution:
Step 1: Draw a line segment RE = 5.1 cm.
Step 2: Draw an angle of 90° at E and cut EA = 5.1 cm.
Step 3: Draw two arcs from A and R with radius 5.1 cm to cut each other at D.
Step 4: Join RD and AD.
Thus, READ is the required square.
Ex 4.5 Class 8 Maths Question 2.
A rhombus whose diagonals are 5.2 cm and 6.4 cm long.Solution:
Step 1: Draw a line
segment AC = 6.4 cm.
Step 2: Draw the perpendicular bisector of AC at E.
Step 3: Draw two arcs with centre E and radius = ½ × 5.2 = 2.6 cm to cut the perpendicular bisector
of AC at B and D.
Step 4: Join AD, AB, BC and DC.
Thus, ABCD is the required rhombus.
Ex 4.5 Class 8 Maths Question 3.
A rectangle with adjacent sides of lengths 5 cm and 4 cm.Solution:
Steps of Construction: Let the two
adjacent sides of a rectangle PQRS be PQ = 5 cm and QR = 4 cm.
Step 1: Draw a line segment PQ = 5 cm.
Step 2: Draw an angle of 90° at Q and cut QR = 4 cm.
Step 3: Draw an arc with centre R and radius 5 cm.
Step 4: Draw another arc with centre P and radius 4 cm to cut the previous arc at S.
Step 5: Join RS and PS.
Thus, PQRS is the required rectangle.
Ex 4.5 Class 8 Maths Question 4.
A parallelogram OKAY where OK = 5.5 cm and KA = 4.2 cm. Is it unique?Solution:
Step 1: Draw a line segment OK = 5.5 cm.
Step 2: Draw an angle of any measure (say 60°) at K and cut KA = 4.2 cm.
Step 3:
Draw an arc with centre A and radius 5.5 cm.
Step 4: Draw another arc with centre O and
radius 4.2 cm to cut the previous arc at Y.
Step 5: Join AY and OY.
Thus, OKAY is the required parallelogram.
No, it is not a unique parallelogram. The angle
of 60° made at K can be of measure other than 60°.
You can also like these:
NCERT Solutions for Maths Class 9
NCERT Solutions for Maths Class 10
NCERT Solutions for Maths Class 11