CBSE Board Practice

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CBSE Grade VII - The Triangle and its Properties

Question 1

1.	In the given figure, △HIJ in which side IJ has been produced to K. If ∠JHI = x° , ∠HIJ = (1/3a)° , ∠IJH = (1/2a)° and ∠HJK = (1a)°, find the values of a and x.
	a = 118° , x = 78° a = 121° , x = 81° a = 119° , x = 79° a = 120° , x = 80° a = 122° , x = 82°

Question 2

2.	Find the unknown angle in the following figure
	x = 54.13° x = 57.13° x = 55.13° x = 53.13° x = 56.13°

Question 3

3.	In a right-angled triangle if one of the acute angles is 28°, find the measure of the other acute angle.
	62° 64° 61° 60° 63°

Question 4

4.	Find the angles of the triangle
	I = 60° , J = 45° , K = 75° I = 62° , J = 45° , K = 73° I = 60° , J = 43° , K = 77° I = 58° , J = 47° , K = 75° I = 58° , J = 45° , K = 77°

Question 5

5.	In a right angled triangle, if one of the angles is 40.6°, find the third angle
	49.4° 64.4° 59.4° 54.4° 79.4°

Question 6

6.	The vertex opposite to the side   XV
	W   XY     Z V

Question 7

7.	Which of the following are measures of an equilateral triangle ?
	OP = 12 cm , PQ = 10 cm , QO = 15.62 cm OP = 13 cm , PQ = 10 cm , QO = 13 cm OP = 13 cm , PQ = 13 cm , QO = 13 cm OP = 13 cm , PQ = 11 cm , QO = 14 cm OP = 12 cm , PQ = 12 cm , QO = 16.97 cm

Question 8

8.	Find the unknown angles in the following figure
	F = 55° , G = 55° F = 56° , G = 56° F = 57° , G = 57° F = 54° , G = 54° F = 58° , G = 58°

Question 9

9.	Two angles of a triangle measure 68° and 57° respectively. Find the measure of the third angle of the triangle
	53° 57° 56° 54° 55°

Question 10

10.	Find the unknown marked angle in the following figure
	x = 53.1° x = 49.1° x = 50.1° x = 51.1° x = 52.1°

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