pq=ab+cd where ab=5.3cm and op=2.7cm
Answers
Answer:
Question 1:
Draw a circle of radius 3.2 cm.
Answer:
Steps of construction:
(a) Open the compass for the required radius of 3.2 cm.
(b) Make a point with a sharp pencil where we want the centre of circle to be.
(c) Name it O.
(d) Place the pointer of compasses on O.
(e) Turn the compasses slowly to draw the circle.
Hence, it is the required circle.
Class_6_Practical_Geometry_Construction_Of_A_Circle_With_Radius_3.2cm
Question 2:
With the same centre O, draw two circles of radii 4 cm and 2.5 cm.
Answer:
Steps of construction:
(a) Marks a point O with a sharp pencil where we want the centre of the circle.
(b) Open the compasses 4 cm.
Class_6_Practical_Geometry_Two_Cocentric_Circles
(c) Place the pointer of the compasses on O.
(d) Turn the compasses slowly to draw the circle.
(e) Again open the compasses 2.5 cm and place the pointer of the compasses on D.
(f) Turn the compasses slowly to draw the second circle.
Hence, it is the required figure.
Question 3:
Draw a circle and any two of its diameters. If you join the ends of these diameters, what
is the figure obtained if the diameters are perpendicular to each other? How do you check
your answer?
Answer:
(i) By joining the ends of two diameters, we get a rectangle. By measuring, we find AB = CD = 3
cm, BC = AD = 2 cm, i.e., pairs of opposite sides are equal and also
angle A = angle B = angle C = angle D = 90 degree
i.e. each angle is of 90 degree. Hence, it is a rectangle.
Class_6_Practical_Geometry_Construction_Of_A_Circle1
(ii) If the diameters are perpendicular to each other, then by joining the ends of two
diameters, we get a square.
By measuring, we find that AB = BC = CD = DA = 2.5 cm, i.e., all four sides are equal
Also, angle A = angle B = angle C = angle D = 90 degree
i.e. each angle is of 90 degree. Hence, it is a square.
Class_6_Practical_Geometry_Construction_Of_A_Circle2