Chapter 5 – Lines and Angles
Assignment 2
Q.1. Find the angle which is its own complement.
Q.2. Find the angle which is its own Supplement.
Q.3. Find the angle which is 1/3rd of its own complement.
Q.4. Find the angle which is 2/3rd of its own supplement.
Q.5. Find supplementary angle of complementary angle of angle 30°.
Q.6. In the given figure, AB is a straight line and ∠BOC = 65°, find ∠AOC.
Q.7. In the given figure, COB is a straight line. Find the value of x.
Q.8. In the given figure, OA || EC and OB || ED. Prove that ∠AOB = ∠CED.
Q.9. Prove that the two lines in a plane, which are perpendicular to the same given line in the plane, are parallel to each other.
Q.10. In the given figure, what value of x will make AOB a straight line?
Q.11. In the given figure, find x, y and z.
Q.12. In the adjoining figure, it is being given that AO || CD, OB || CE and ∠AOB = 50°. Find the measure of ∠ECD.
Q.13. In the given figure, ∠A= 60°, CE || BA and ∠ECD = 65°. Find ∠ACB.
Q.14. Find vertically opposite angle of supplementary angle of interior alternate angle of corresponding angle of an exterior angle 40° made with two parallel lines.
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