Parallel lines are lines that never cross each other - they keep the same distance apart from each other. When two lines intersect, the opposite (X) angles are equal. On parallel lines, alternate (Z) ...

Click to see a step-by-step slideshow. STEP 2: Label the angle you know and colour in the angle arc. Colour in the opposite angle in the same colour, and the other two angles in a different colour.

CBSE Class 9 Maths extra questions and answers for Chapter 6 - Lines and Angles provided here for students to revise important fundamental concepts. Practicing with these questions will help you ...