(a) 64

(i) its complement

(ii)4/5 of its supplement

(iii)2/3 of its complement

(2x +5)

(a)∠2,∠4 (b)∠1,∠8 (c)∠4,∠5 (d)∠3,∠6 (e)∠5,∠7 (f)∠5,∠8 |

Find ∠2 and ∠3.

Q.10 Consider the diagram in Q.8. If ∠1 = 2x + 60 and ∠3 = x + 110 then find x and also find the measure of angle 1 and angle 2.

Q.11 Define parallel lines and transversal.

Q.12 Find the angle, which is equal to its supplementary.

Q.13 The sum of two adjacent angles is 140. If one angle is thrice that of the other. Find the two angles.

Q.14 Two supplementary angles are in the ratio of 5:7.Find the angles.

Q.15 Consider the diagram from Q.6. ∠1= 2x, ∠2= 3x, ∠3 = 4x and

∠5 = x. Find x and measure of each angles.

Q.16 State True or False.

1) Two obtuse angles form a linear pair.

2) Two acute angles form a linear pair.

3) If two adjacent angles are complementary they form a right angle.

4) An Angle is formed by the intersection of lines or line segments or rays.

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