ICSE Board Practice

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ICSE Grade VII - Triangles

Question 1

1.	In the given figure, it is given that JI ∥ LK , ∠JLK = 68° and ∠JIH = 87°. Find the value of x.
	x = 26° x = 27° x = 24° x = 25° x = 23°

Question 2

2.	Find the measures of the three sides suitable to form a triangle?
	FG = 5 cm , GH = 13 cm , HF = 5 cm FG = 6 cm , GH = 17 cm , HF = 9 cm FG = 17 cm , GH = 5 cm , HF = 11 cm FG = 14 cm , GH = 10 cm , HF = 13 cm FG = 5 cm , GH = 18 cm , HF = 5 cm

Question 3

3.	Each of the two equal angles of an isosceles triangle is half the third angle. Find the angles of the triangle
	X = 45° , Y = 90° , Z = 45° X = 47° , Y = 90° , Z = 43° X = 43° , Y = 92° , Z = 45° X = 43° , Y = 90° , Z = 47° X = 45° , Y = 88° , Z = 47°

Question 4

4.	Find the unknown marked angles in the following figure
	x = 125° , y = 155° x = 124° , y = 154° x = 122° , y = 152° x = 121° , y = 151° x = 123° , y = 153°

Question 5

5.	Calculate the value of the lettered angle in the following figure
	x = 60.17° x = 62.17° x = 58.17° x = 61.17° x = 59.17°

Question 6

6.	In a right angled triangle, if one of the angles is 35.54°, find the third angle
	64.46° 69.46° 54.46° 59.46° 84.46°

Question 7

7.	Two angles of a triangle measure 68° and 65° respectively. Find the measure of the third angle of the triangle
	49° 48° 47° 46° 45°

Question 8

8.	In the given figure, find the values of x and y.
	x = 22.89° , y = 49.14° x = 24.89° , y = 51.14° x = 21.89° , y = 48.14° x = 23.89° , y = 50.14° x = 25.89° , y = 52.14°

Question 9

9.	Find the unknown angle in the following figure
	x = 43° x = 45° x = 44° x = 47° x = 46°

Question 10

10.	The point of intersection of the altitudes of a triangle is called
	incentre orthocentre excentre centroid median

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