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Ex.5.2 Q1 Lines and Angles - NCERT Maths Class 7

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State the property that is used in each of the following statements?

(i)   If \(a || b,\) then \(\angle1 = \angle5.\)

(ii)  If \(\angle4 = \angle6,\) then \(a || b.\)

(iii) If \(\angle4 + \angle5 = 180^\circ,\) then \(a || b.\) 

 Video Solution
Lines & Angles
Ex 5.2 | Question 1

Text Solution


(i) If two parallel lines are intersected by a transversal, then each pair of corresponding angles are equal .

(ii) When a transversal intersects two parallel lines such that if pair of alternate interior angles are equal then the lines are parallel.

(iii) When a transversal intersects two parallel line such that pair of interior angles on the same side of transversal are supplementary, then the lines are parallel.

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