Parallel and Intersecting Lines

When two straight lines meet at

When two straight lines meet at a point on a plane surface, they are called intersecting lines. They form four angles at the point of intersection. Tw

When two lines intersect

When two lines intersect, the angles that are opposite to each other are called vertically opposite angles. These angles are always equal. For example

Adjacent angles formed by two intersecting

Adjacent angles formed by two intersecting lines are called linear pairs. They always add up to 180° because together they form a straight angle. If o

Two lines that intersect at right

Two lines that intersect at right angles (90°) are called perpendicular lines. All four angles formed are equal, each measuring 90°. The symbol ⊥ is u

Lines that lie on the same

Lines that lie on the same plane and never meet, no matter how far they are extended, are called parallel lines. They maintain the same distance betwe