ICSE Board Practice

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ICSE Grade IX - Polygons
Question 1
1.
Identify the figure below
  • heptagon
  • nonagon
  • angle
  • decagon
  • hexagon
Question 2
2.
How many diagonals does a hexagon have?
  • 10
  • 7
  • 12
  • 9
  • 8
Question 3
3.
Identify the figure below
  • square
  • trapezium
  • triangle
  • kite
  • parallelogram
Question 4
4.
Identify the figure below
  • circle
  • octagon
  • quadrilateral
  • angle
  • decagon
Question 5
5.
Three angles of a quadrilateral are equal and the fourth angle measure 111.8°. What is the measure of each of the equal angles?
  • 84.73°
  • 82.73°
  • 83.73°
  • 81.73°
  • 80.73°
Question 6
6.
The number of diagonals in a regular polygon with n sides is
  • (
    n
    		) (
    n
    −
    3
    		)
    2
  • (
    n
    		) (
    n
    −
    1
    		)
    2
  • (
    n
    		) (
    n
    −
    2
    		)
    2
  • (
    n
    		) (
    n
    +
    2
    		)
    2
  • (
    n
    		) (
    n
    +
    3
    		)
    2
Question 7
7.
Three angles of quadrilateral measure 67.5°, 112.88° and 56.63° respectively. Find the measure of the fourth angle
  • 122.99°
  • 124.99°
  • 121.99°
  • 120.99°
  • 123.99°
Question 8
8.
Two adjacent angles of a parallelogram DEFG are in the ratio 6 : 14. Find the measure of each of its angles.
  • D
    =
    56°
    ,
    E
    =
    125°
    ,
    F
    =
    52°
    ,
    G
    =
    127°
  • D
    =
    54°
    ,
    E
    =
    126°
    ,
    F
    =
    54°
    ,
    G
    =
    126°
  • D
    =
    55°
    ,
    E
    =
    125°
    ,
    F
    =
    56°
    ,
    G
    =
    124°
  • D
    =
    53°
    ,
    E
    =
    124°
    ,
    F
    =
    55°
    ,
    G
    =
    128°
  • D
    =
    52°
    ,
    E
    =
    128°
    ,
    F
    =
    53°
    ,
    G
    =
    127°
Question 9
9.
How many diagonals does an octagon have?
  • 23
  • 19
  • 20
  • 18
  • 21
Question 10
10.
Identify the figure below
  • trapezium
  • kite
  • rectangle
  • square
  • parallelogram