ICSE Board Practice

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ICSE Grade IX - Polygons
Question 1
1.
Identify the figure below
  • rhombus
  • circle
  • triangle
  • angle
  • parallelogram
Question 2
2.
Two adjacent angles of a parallelogram PQRS are in the ratio 11 : 25. Find the measure of each of its angles.
  • P
    =
    57°
    ,
    Q
    =
    124°
    ,
    R
    =
    53°
    ,
    S
    =
    126°
  • P
    =
    55°
    ,
    Q
    =
    125°
    ,
    R
    =
    55°
    ,
    S
    =
    125°
  • P
    =
    56°
    ,
    Q
    =
    124°
    ,
    R
    =
    57°
    ,
    S
    =
    123°
  • P
    =
    54°
    ,
    Q
    =
    123°
    ,
    R
    =
    56°
    ,
    S
    =
    127°
  • P
    =
    53°
    ,
    Q
    =
    127°
    ,
    R
    =
    54°
    ,
    S
    =
    126°
Question 3
3.
How many diagonals does a triangle have?
  • 0
  • 2
  • 1
  • 4
  • 3
Question 4
4.
Three angles of a quadrilateral are equal and the fourth angle measure 57.61°. What is the measure of each of the equal angles?
  • 100.80°
  • 102.80°
  • 98.80°
  • 101.80°
  • 99.80°
Question 5
5.
Identify the figure below
  • parallelogram
  • rectangle
  • kite
  • trapezium
  • square
Question 6
6.
How many diagonals does an octagon have?
  • 20
  • 21
  • 22
  • 18
  • 19
Question 7
7.
The value of each interior angle in an n-sided regular polygon is
  • [
    (2n - 4) x 90
    n
    		 ] °
  • (
    360
    n
    		 ) °
  • (
    n
    360
    		 ) °
  • [
    (2n - 4) x 180
    n
    		 ] °
Question 8
8.
How many diagonals does a heptagon have?
  • 12
  • 14
  • 15
  • 13
  • 17
Question 9
9.
Sum of the interior angles in a quadrilateral is
  • 360°
  • 365°
  • 390°
  • 375°
  • 370°
Question 10
10.
Sum of the interior angles in a decagon is
  • 1470°
  • 1455°
  • 1440°
  • 1445°
  • 1450°