ICSE Board Practice

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ICSE Grade VII - Triangles

Question 1

1.	The name of the triangle is
	△JKL △KLN △KLM △LMN △JKM

Question 2

2.	In the given figure, it is given that ED ∥ GF , ∠EGF = 51° and ∠EDC = 103°. Find the value of x.
	x = 27° x = 24° x = 26° x = 28° x = 25°

Question 3

3.	In the given figure, find ∠GHF
	42° 39° 38° 40° 41°

Question 4

4.	Which of the following are measures of an isosceles triangle ?
	∠G = 60° , ∠H = 60° , ∠I = 60° ∠G = 50.06° , ∠H = 64.97° , ∠I = 64.97° ∠G = 40.91° , ∠H = 90° , ∠I = 49.09° ∠G = 41.65° , ∠H = 85.46° , ∠I = 52.89° ∠G = 55.3° , ∠H = 76.33° , ∠I = 48.37°

Question 5

5.	The point of intersection of the bisectors of the interior angle and the two exterior opposite angles of a triangle is called
	median excentre incentre altitude circumcentre

Question 6

6.	The perpendicular drawn from each vertex to the opposite side of a triangle is called
	orthocentre median altitude incentre excentre

Question 7

7.	In a right angled triangle, if one of the angles is 38.16°, find the third angle
	61.84° 66.84° 56.84° 51.84° 81.84°

Question 8

8.	Which of the following are measures of a scalene triangle ?
	DE = 13 cm , EF = 15 cm , FD = 13 cm DE = 11 cm , EF = 14 cm , FD = 10 cm DE = 14 cm , EF = 14 cm , FD = 14 cm DE = 12 cm , EF = 11 cm , FD = 12 cm DE = 11 cm , EF = 11 cm , FD = 15.56 cm

Question 9

9.	In the following figure, two sides of a triangle have been produced. Find all the angles of the triangle.
	x = 62° , y = 20° , z = 98° x = 60° , y = 20° , z = 100° x = 58° , y = 22° , z = 100° x = 60° , y = 18° , z = 102° x = 58° , y = 20° , z = 102°

Question 10

10.	Consider the following figure. State which of the following statements are true
	a) ∠D ≠ ∠B b) ∠C ≠ ∠D c) ∠D = ∠B d) ∠B = ∠C e) ∠B ≠ ∠C f) ∠C = ∠D
	{b,c,d} {c,d,f} {e,a,f} {b,d} {a,c}

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