ICSE Board Practice

Class VI Class VII Class VIII Class IX Class X
ICSE Grade VIII - Polygons
Question 1
1.
How many sides does a decagon have?
  • 10
  • 9
  • 7
  • 12
  • 11
Question 2
2.
A polygon with 9 sides is called a
  • nonagon
  • octagon
  • pentagon
  • heptagon
  • quadrilateral
Question 3
3.
How many sides does a triangle have?
  • 2
  • 0
  • 4
  • 6
  • 3
Question 4
4.
How many sides does a heptagon have?
  • 7
  • 4
  • 10
  • 6
  • 8
Question 5
5.
How many diagonals does an octagon have?
  • 23
  • 17
  • 19
  • 20
  • 21
Question 6
6.
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 7
7.
Sum of the interior angles in a heptagon is
  • 900°
  • 930°
  • 915°
  • 910°
  • 905°
Question 8
8.
A polygon with 3 sides is called a
  • heptagon
  • nonagon
  • hexagon
  • triangle
  • pentagon
Question 9
9.
Sum of the interior angles in a hexagon is
  • 750°
  • 735°
  • 720°
  • 730°
  • 725°
Question 10
10.
Which of the following figures is a regular quadrilateral?
  • rhombus
  • parallelogram
  • rectangle
  • trapezium
  • square