Page 252 - ICSE Math 6

Self-Testing Exercise 4

GEOMETRY

1. In the adjoining figure, name the following.
(a) Three collinear points C

(b) A ray with initial point O B
(c) A line A

2. Find the magnitude of 280° 53' – 126° 44' 30''.
3. Using a protractor, construct the following angles.
(a) 125° (b) 310°

4. Sort out the angles 12°, 148°, 99°, 105°, 114° and 20° as acute or obtuse.
5. Find y in the following triangles.

(a) (b) y 115°
68°
y

6. Draw an angle of 80° and then bisect it.
7. Draw a circle with AB = 7 cm as diameter.

8. If the diameter of a circle is 16 cm, then what is the length of the line segment passing through
the centre and a point on the circumference of the circle?
9. What is a polygon? Draw a rough sketch of a regular hexagon.
10. Draw nets of a cuboid and a cylinder.

11. Draw a line segment AB of length 5 cm. Draw a line with respect to which points A and B are
symmetric.
12. Draw a triangle ABC with ∠ABC = 30°, AB = 6 cm and BC = 4 cm. If possible, draw line(s) of
symmetry of DABC.

13. Draw a triangle ABC with AB = BC = CA = 4.5 cm. Draw its lines of symmetry.
14. In the following figures, draw the line(s) of symmetry.

(a) (b) (c)

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