ICSE Board Practice

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ICSE Grade IX - Polygons

Question 1

1.	Identify the figure below
	pentagon nonagon octagon angle triangle

Question 2

2.	How many diagonals does an octagon have?
	21 20 19 23 18

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
	circle hexagon quadrilateral octagon angle

Question 5

5.	In the given two equilateral triangles, find ∠J + ∠L + ∠N + ∠K + ∠M + ∠O .
	361° 362° 358° 359° 360°

Question 6

6.	The value of the exterior angle in a regular polygon when the interior angle is given
	90°+ (interior angle) 360°- (interior angle) 180°+ (interior angle) 180°- (interior angle)

Question 7

7.	How many diagonals does a decagon have?
	37 36 35 33 34

Question 8

8.	Sum of the interior angles in a triangle is
	195° 180° 185° 190° 210°

Question 9

9.	How many diagonals does a quadrilateral have?
	1 2 4 3 0

Question 10

10.	Identify the figure below
	rectangle trapezium square kite triangle

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