EASY
9th CBSE
IMPORTANT
Earn 100

A transversal intersects two parallel lines. Prove that the bisectors of any pair of corresponding angles so formed are parallel.

Important Questions on Lines and Angles

EASY
9th CBSE
IMPORTANT
NCERT Exemplar Mathematics - Class 9>Chapter 6 - Lines and Angles>Exercise>Q 2
If one angle of a triangle is equal to the sum of the other two angles, then the triangle is
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Mathematics - Class 9>Chapter 6 - Lines and Angles>Exercise>Q 3
An exterior angle of a triangle is 105° and its two interior opposite angles are equal. Each of these equal angle is
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Mathematics - Class 9>Chapter 6 - Lines and Angles>Exercise>Q 4
The angles of a triangle are in the ratio 5:3:7. The triangle is
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Mathematics - Class 9>Chapter 6 - Lines and Angles>Exercise>Q 7

In the given figure, if OP∥RS, ∠OPQ=110° and ∠QRS=130°, then ∠PQR is equal to

Question Image

EASY
9th CBSE
IMPORTANT
NCERT Exemplar Mathematics - Class 9>Chapter 6 - Lines and Angles>Exercise>Q 8
Angles of a triangle are in the ratio 2:4:3. The smallest angle of the triangle is
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Mathematics - Class 9>Chapter 6 - Lines and Angles>Exercise>Q 2
Can a triangle have all angles less than 60°? Give reason for your answer.
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Mathematics - Class 9>Chapter 6 - Lines and Angles>Exercise>Q 4

Prove that through a given point, we can draw only one perpendicular to a given line.

HARD
9th CBSE
IMPORTANT
NCERT Exemplar Mathematics - Class 9>Chapter 6 - Lines and Angles>Exercise>Q 5
Prove that two lines that are respectively perpendicular to two intersecting lines intersect each other.
[Hint: Use proof by contradiction]