Class 7 · Ganita Prakash
Unit 5 · Class 7Ganita Prakash
Parallel and Intersecting Lines
Angle properties formed by parallel lines and a transversal.
Lessons
3 concepts
- 1Angle Types with TransversalCorresponding: same position at each intersection. Alternate interior: opposite sides of transversal, between lines. Co-interior: same side, between lines.
- 2When Are Lines Parallel?If any pair — corresponding or alternate — is equal, or co-interior sum is 180°, lines are parallel.
- 3Vertically Opposite AnglesWhen two lines cross, the two 'opposite' pairs are equal. Independent of parallelism.
Skills to practise