ICSE Board Practice

Class VI Class VII Class VIII Class IX Class X
ICSE Grade IX - Polygons
Question 1
1.
How many diagonals does a triangle have?
  • 4
  • 1
  • 3
  • 0
  • 2
Question 2
2.
Sum of the interior angles in a triangle is
  • 210°
  • 190°
  • 195°
  • 185°
  • 180°
Question 3
3.
Sum of the interior angles in a hexagon is
  • 735°
  • 725°
  • 720°
  • 730°
  • 750°
Question 4
4.
The number of diagonals in a regular polygon with n sides is
  • (
    n
    		) (
    n
    −
    1
    		)
    2
  • (
    n
    		) (
    n
    +
    3
    		)
    2
  • (
    n
    		) (
    n
    −
    3
    		)
    2
  • (
    n
    		) (
    n
    +
    2
    		)
    2
  • (
    n
    		) (
    n
    −
    2
    		)
    2
Question 5
5.
Identify the figure below
  • square
  • trapezium
  • kite
  • rhombus
  • circle
Question 6
6.
How many diagonals does a quadrilateral have?
  • 4
  • 3
  • 0
  • 2
  • 1
Question 7
7.
Identify the figure below
  • octagon
  • angle
  • triangle
  • decagon
  • circle
Question 8
8.
Identify the figure below
  • decagon
  • triangle
  • hexagon
  • nonagon
  • heptagon
Question 9
9.
Two adjacent angles of a parallelogram CDEF are in the ratio 10 : 10. Find the measure of each of its angles.
  • C
    =
    92°
    ,
    D
    =
    89°
    ,
    E
    =
    88°
    ,
    F
    =
    91°
  • C
    =
    90°
    ,
    D
    =
    90°
    ,
    E
    =
    90°
    ,
    F
    =
    90°
  • C
    =
    89°
    ,
    D
    =
    88°
    ,
    E
    =
    91°
    ,
    F
    =
    92°
  • C
    =
    88°
    ,
    D
    =
    92°
    ,
    E
    =
    89°
    ,
    F
    =
    91°
  • C
    =
    91°
    ,
    D
    =
    89°
    ,
    E
    =
    92°
    ,
    F
    =
    88°
Question 10
10.
The value of each exterior angle in an n-sided regular polygon is
  • (
    360
    n
    		 ) °
  • (
    n
    360
    		 ) °
  • [
    (2n - 4) x 180
    n
    		 ] °
  • [
    (2n - 4) x 90
    n
    		 ] °