ICSE Board Practice

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ICSE Grade IX - Polygons
Question 1
1.
Sum of the interior angles in a hexagon is
  • 750°
  • 735°
  • 730°
  • 720°
  • 725°
Question 2
2.
The value of the exterior angle in a regular polygon when the interior angle is given
  • 180°- (interior angle)
  • 360°- (interior angle)
  • 180°+ (interior angle)
  • 90°+ (interior angle)
Question 3
3.
The value of each exterior angle in an n-sided regular polygon is
  • [
    (2n - 4) x 90
    n
    		 ] °
  • (
    n
    360
    		 ) °
  • (
    360
    n
    		 ) °
  • [
    (2n - 4) x 180
    n
    		 ] °
Question 4
4.
Identify the figure below
  • octagon
  • circle
  • triangle
  • heptagon
  • hexagon
Question 5
5.
The value of each interior angle in an n-sided regular polygon is
  • (
    n
    360
    		 ) °
  • [
    (2n - 4) x 180
    n
    		 ] °
  • (
    360
    n
    		 ) °
  • [
    (2n - 4) x 90
    n
    		 ] °
Question 6
6.
Identify the figure below
  • square
  • circle
  • angle
  • rectangle
  • triangle
Question 7
7.
Identify the figure below
  • square
  • trapezium
  • triangle
  • circle
  • parallelogram
Question 8
8.
In the given two equilateral triangles, find ∠I + ∠K + ∠M + ∠J + ∠L + ∠N .
  • 360°
  • 358°
  • 361°
  • 362°
  • 359°
Question 9
9.
Sum of the interior angles in an octagon is
  • 1110°
  • 1085°
  • 1095°
  • 1080°
  • 1090°
Question 10
10.
The number of diagonals in a regular polygon with n sides is
  • (
    n
    		) (
    n
    +
    2
    		)
    2
  • (
    n
    		) (
    n
    −
    2
    		)
    2
  • (
    n
    		) (
    n
    −
    3
    		)
    2
  • (
    n
    		) (
    n
    +
    3
    		)
    2
  • (
    n
    		) (
    n
    −
    1
    		)
    2