ICSE Board Practice

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ICSE Grade VII - Triangles

Question 1

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

Question 2

2.	In the following figure, two sides of a triangle have been produced. Find all the angles of the triangle.
	x = 36° , y = 61° , z = 83° x = 34° , y = 65° , z = 81° x = 36° , y = 63° , z = 81° x = 38° , y = 63° , z = 79° x = 34° , y = 63° , z = 83°

Question 3

3.	In the given figure, calculate the value of x.
	x = 140° x = 141° x = 139° x = 138° x = 142°

Question 4

4.	In the given figure, if LJ = JM = KM. Find the value of x.
	x = 91° x = 93° x = 95° x = 94° x = 92°

Question 5

5.	Identify the points that are inside the triangle
	{M,P,S} {N,Q,T} {O,R,U} {T,Q,M} {T,U,N}

Question 6

6.	The line joining each vertex to the mid-point of the opposite side of a triangle is called
	altitude incentre median centroid orthocentre

Question 7

7.	In the given figure, it is given that ED ∥ GF , ∠EGF = 78° and ∠EDC = 74°. Find the value of x.
	x = 29° x = 28° x = 26° x = 27° x = 30°

Question 8

8.	Which of the following may lie outside or on the triangle?
	a) circumcentre b) orthocentre c) incentre d) excentre e) centroid
	{a,b,d} {c,a,b} {e,b} {c,e,d} {c,a}

Question 9

9.	Which of the following are measures of an obtuse angled triangle ?
	∠K = 51.32° , ∠L = 45.21° , ∠M = 83.47° ∠K = 45.57° , ∠L = 76.87° , ∠M = 57.56° ∠K = 37.57° , ∠L = 90° , ∠M = 52.43° ∠K = 122.01° , ∠L = 22.67° , ∠M = 35.32° ∠K = 45° , ∠L = 90° , ∠M = 45°

Question 10

10.	The altitude corresponding to the side   NL
	LM       NQ       LP       LO       MP

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