Parallel lines are straight lines which have the ... The lines make an X shape. Co-interior angles add up to 180°. The lines make a C shape which can also be back to front.

Save guides, add subjects and pick up where you left off with your BBC account. Intersecting lines are lines that cross each other. Parallel lines are lines that never cross each other - they keep ...

A transversal intersects two parallel lines as shown in the figure given ... to as consecutive interior angles or allied angles or co-interior angles. 8. In the following figure, find the value ...

If a transversal intersects two parallel lines, then (i) each pair of corresponding angles is equal, (ii) each pair of alternate interior angles is equal, (iii) each pair of interior angles on the ...