The document Worksheet Question - Lines and Angles Class 7 Notes | EduRev is a part of the Class 7 Course Mathematics (Maths) Class 7.

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**Ques 1: (a) Complementary angle of 65Â° is .......................****(b) Supplementary angle of 45Â° is .........................****(c) If line AB||CD and LM is transversal, sum of two interior angles on the same side of transversal is equal to ......................****(d) An angle is formed by the intersection of ........................... ****Ans: ****(a)** 25Â°**(b)** 135Â°**(c)** 180Â°**(d)** Two lines or two surfaces**Ques 2: In the figure, identify the pairs of corresponding angles.**

**Ans: **âˆ 1 & âˆ 5, âˆ 2 & âˆ 6, âˆ 4 & âˆ 8, âˆ 3 & âˆ 7**Ques 3: An angle is greater than 45Â°. Its complement will be:****(a) Less than 45Â°****(b) Equal to 45Â°****(c) Greater than 45Â°****(d) None of these ****Ans:** (a)**Ques 4: State true of false: ****(a) If measure fo an angle is 90Â° then its supplement angle will be greater than 90Â°.****(b) Two obtuse angles form a linear pair.****(c) Two acute angles form a linear pair.****(d) If two adjacent angles are complementary they form a right angle. ****Ans: ****(a)** False**(b)** False**(c)** False**(d)** True**Ques 5: In the figure, the arms of two angles are parallel.****If **âˆ **PQR = 70Â°, then find****(i) **âˆ **LGR****(ii) **âˆ **LMN**

**Ans: ****(i)** âˆ LGR = 70Â°**(ii) **âˆ LMN = 70Â°**Ques 6: Indicate two pairs of angles which are: ****(i) Vertically opposite angles ****(ii) Linear pairs**

**Ans. ****(i)** âˆ a & âˆ d**(ii)** âˆ a & âˆ e, âˆ e & âˆ d**Ques 7: In the following figure, is **âˆ **x is adjacent to **âˆ **y?****Give reason.****Ans: **No. because vertex is not common**Ques 8: Find the angle: ****(i) Which is equal to its complement. ****(ii) Which is equal to its supplement.****Ans. ****(i)** 45Â°**(ii)** 90Â°**Ques 9: In the given figure, decide a is parallel to b:****(i)**

**(ii)**

**(iii)**

**Ans. ****(i)** Yes**(ii)** No**(iii)** Yes**Ques 11: State the property that is used in each of the following statements:****(i) If l || m, then **âˆ **4 = **âˆ **8 ****(ii) If **âˆ **1 = **âˆ **7, then l || m ****(iii) If **âˆ **3 + **âˆ **8 = 180Â°, then l||m**

**Ans. ****(i)** Correspondign angles**(ii)** Corresponding & vertically opposite angles**(iii)** Linear Pair**Ques 11: Find the value of y in each of the following figure if a || b:****(i)**

**(ii)****(iii)**

**Ans: ****(i)** y = 60Â°**(ii)** y = 60Â°**(iii)** y = 130Â°**Ques 12: In the following figure name the following pairs of angles:****(i) Obtuse vertically opposite angles.****(ii) Adjacent complement angles.****(iii) Euqal supplementary angles.****(iv) Unequal supplementary angles.****(v) Adjacement angles that do not form a linear pair.**

**Ans.**** (i)** âˆ POS & âˆ QOR**(ii)** âˆ QOP & âˆ POT**(iii)** âˆ QOT & âˆ TOS**(iv)** âˆ POQ & âˆ QOR, âˆ POQ & âˆ POS**(v)** âˆ TOS & âˆ SOR, âˆ POQ & âˆ POT, âˆ POT & âˆ TOS

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