ICSE Board Practice

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ICSE Grade IX - Triangles

Question 1

1.	With the data in the given figure, △IOJ ≅ △IOK by which property?
	SSS Congruency RHS Congruency ASA Congruency SAS Congruency not congruent

Question 2

2.	In the given figure, △FGH is an obtuse angled triangle. △FGI ≅ △HGI by which property?
	SSS Congruency not congruent RHS Congruency ASA Congruency SAS Congruency

Question 3

3.	In  △CDE, if ∠C = 40° and ∠D = ∠E, find the measure of each of the equal angles of the triangle
	72° 68° 69° 70° 71°

Question 4

4.	The altitude corresponding to the side   IJ
	IM       JM       KN       IL       IJ

Question 5

5.	The sides of the triangle are
	NO     ,   OM     ,   MN       NP     ,   PM     ,   MN       PQ     ,   QO     ,   OP       OQ     ,   QN     ,   NO       OP     ,   PN     ,   NO

Question 6

6.	In the given figure, QR ∥ ST, ∠LIR = 61° and IJ = KI. Find the measure of x.
	x = 58° x = 57° x = 60° x = 59° x = 56°

Question 7

7.	Find the unknown marked angles in the following figure
	x = 111° , y = 44° x = 112° , y = 45° x = 115° , y = 48° x = 114° , y = 47° x = 113° , y = 46°

Question 8

8.	Which of the following are measures of an isosceles triangle ?
	FG = 12 cm , GH = 11 cm , HF = 16.28 cm FG = 14 cm , GH = 12 cm , HF = 13 cm FG = 13 cm , GH = 11 cm , HF = 13 cm FG = 13 cm , GH = 13 cm , HF = 13 cm FG = 12 cm , GH = 10 cm , HF = 11 cm

Question 9

9.	Which of the following are measures of an obtuse angled triangle ?
	∠L = 45° , ∠M = 90° , ∠N = 45° ∠L = 50.48° , ∠M = 50.48° , ∠N = 79.04° ∠L = 38.16° , ∠M = 90° , ∠N = 51.84° ∠L = 119.17° , ∠M = 27.36° , ∠N = 33.47° ∠L = 55.3° , ∠M = 76.33° , ∠N = 48.37°

Question 10

10.	Which of the following are measures of an isosceles right angled triangle ?
	∠F = 60° , ∠G = 60° , ∠H = 60° ∠F = 111.8° , ∠G = 27.66° , ∠H = 40.54° ∠F = 61.28° , ∠G = 69.98° , ∠H = 48.74° ∠F = 57.12° , ∠G = 78.46° , ∠H = 44.42° ∠F = 45° , ∠G = 90° , ∠H = 45°

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