CBSE Class 6 Mathematics Shapes Assignment Set 07

Question. From the adjoining figure, name the angle, vertex, arms
Answer:
\(\angle AOB\) – angle
\(O\) – vertex
\(\overrightarrow{OA}, \overrightarrow{OB}\) – arms

Question. In the adjoining figure name the angles and also name the figure formed.
Answer:
Angles: \(\angle A, \angle ABD, \angle ADB, \angle DBC, \angle C, \angle CDB\)
Figure formed: Quadrilateral \(ABCD\) (composed of two triangles, \(\triangle ABD\) and \(\triangle BCD\))

Question. From the adjoining figure write another name to read the angles \(\angle 1, \angle 2, \angle 3, \angle 4\).
Answer:
\(\angle 1 = \angle AGF\)
\(\angle 2 = \angle BGH\)
\(\angle 3 = \angle GHD\)
\(\angle 4 = \angle CHE\)

Question. Does the vertex of an angle lie in its
(i) interior
(ii) exterior.
Answer:
(i) NO
(ii) NO

Question. How many right angles do you make if you face
(a) East and turn clockwise to west
(b) South and turn anticlockwise to East.
(c) North and turn clockwise to West.
Answer:
(a) Two right angles
(b) One right angle
(c) Three right angles

Question. Where will the minute hand of a clock stop if it starts from
(a) 3 and turn through a right angle.
(b) 6 and turn through two right angles.
(c) 9 and turn through three right angles.
(d) 12 and turn through four right angles.
Answer:
(a) 6
(b) 12
(c) 6
(d) 12

Question. How many degrees are there in the angle between the hands of a clock when it is
(a) 6 o'clock
(b) 8 o'clock
(c) 12 o'clock
Answer:
(a) \(180^\circ\)
(b) \(120^\circ\)
(c) \(0^\circ\)

Question. Find number of degrees in
(a) two right angles
(b) three right angles
(c) one right angle
(d) four right angles
Answer:
(a) \(180^\circ\)
(b) \(270^\circ\)
(c) \(90^\circ\)
(d) \(360^\circ\)

Question. Convert the following angles of degrees into right angles.
(a) \(1350^\circ\)
(b) \(1440^\circ\)
(c) \(1080^\circ\)
(d) \(270^\circ\)
Answer:
(a) 15 right angles
(b) 16 right angles
(c) 12 right angles
(d) 3 right angles

Question. Classify the type of angles.
(a) \(30^\circ\)
(b) \(90^\circ\)
(c) \(91^\circ\)
(d) \(269^\circ\)
(e) \(360^\circ\)
(f) \(180^\circ\)
Answer:
(a) acute
(b) right
(c) obtuse
(d) reflex
(e) complete
(f) straight