ICSE Board Practice

Class VI Class VII Class VIII Class IX Class X
ICSE Grade IX - Polygons
Question 1
1.
    • Find the number of sides in a regular polygon if each
    • exterior
    • angle is
    • 6°
  • 63
  • 60
  • 61
  • 59
  • 57
Question 2
2.
The angles of a quadrilateral DEFG are in the ratio 5 : 6 : 4 : 25. Find the measure of each angle of the quadrilateral.
  • D
    =
    45°
    ,
    E
    =
    54°
    ,
    F
    =
    36°
    ,
    G
    =
    225°
  • D
    =
    47°
    ,
    E
    =
    53°
    ,
    F
    =
    34°
    ,
    G
    =
    226°
  • D
    =
    46°
    ,
    E
    =
    53°
    ,
    F
    =
    38°
    ,
    G
    =
    223°
  • D
    =
    43°
    ,
    E
    =
    56°
    ,
    F
    =
    35°
    ,
    G
    =
    226°
  • D
    =
    44°
    ,
    E
    =
    52°
    ,
    F
    =
    37°
    ,
    G
    =
    227°
Question 3
3.
Identify the figure below
  • octagon
  • quadrilateral
  • angle
  • decagon
  • triangle
Question 4
4.
Sum of the interior angles in an octagon is
  • 1090°
  • 1080°
  • 1095°
  • 1110°
  • 1085°
Question 5
5.
The number of diagonals in a regular polygon with n sides is
  • (
    n
    		) (
    n
    −
    1
    		)
    2
  • (
    n
    		) (
    n
    −
    2
    		)
    2
  • (
    n
    		) (
    n
    +
    2
    		)
    2
  • (
    n
    		) (
    n
    +
    3
    		)
    2
  • (
    n
    		) (
    n
    −
    3
    		)
    2
Question 6
6.
Which of the following figures is a regular quadrilateral?
  • trapezium
  • rectangle
  • parallelogram
  • square
  • rhombus
Question 7
7.
Identify the figure below
  • angle
  • kite
  • rectangle
  • parallelogram
  • square
Question 8
8.
Sum of the interior angles in a quadrilateral is
  • 390°
  • 365°
  • 375°
  • 360°
  • 370°
Question 9
9.
Three angles of a quadrilateral are equal and the fourth angle measure 68.67°. What is the measure of each of the equal angles?
  • 98.11°
  • 97.11°
  • 95.11°
  • 99.11°
  • 96.11°
Question 10
10.
Three angles of quadrilateral measure 31.79°, 44.47° and 142.13° respectively. Find the measure of the fourth angle
  • 140.61°
  • 142.61°
  • 141.61°
  • 139.61°
  • 143.61°