MEDIUM
Earn 100

Define parallel lines and transversal. Also, state the properties of angles by a transversal when it intersects two parallel lines at different points.

Important Questions on Lines and Angles

EASY

From the given figure, name the four concurrent points 

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HARD
Prove that two lines that are respectively perpendicular to two intersecting lines intersect each other.
[Hint: Use proof by contradiction]
EASY

Two intersecting lines cannot be both parallel to the same line.

EASY

The statement that 'the lines are parallel if they do not intersect' is in the form of

MEDIUM
Prove that a line joining the midpoints of the parallel sides of a trapezium divides it into two equal parts.
EASY

Three lines are concurrent if they have a common point.

EASY

In parallelogram PQRS, mP=mR=108°, mQ=mS=72°. State which pair of sides of those given below is parallel.

EASY

In how many points can two different lines at the most intersect?

EASY
Define parallel lines. Are there other terms that need to be defined first? What are they, and how will you define them?
 
EASY

Two lines are parallel only when they have no point in common.

EASY
Mention two real-life situations where we use parallel lines.