Category: Class 9

5. In Fig., POQ is a line. Ray OR is perpendicular to line PQ. OS is another ray

4. In Fig., if x + y = w + z, then prove that AOB is a line.

3. In Fig., ∠PQR = ∠PRQ, then prove that ∠PQS = ∠PRT.   Lines and Angles Exercise 6.1

2. In Fig., lines XY and MN intersect at O. If ∠POY = 90° and a : b

1. In Fig., lines AB and CD intersect at O. If ∠AOC + ∠BOE = 70° and ∠BOD

7. Why is Axiom 5, in the list of Euclid’s axioms, considered a ‘universal truth’? (Note that the question

6. In Figure, if AC = BD, then prove that AB = CD. Introduction To Euclid’s Geometry Exercise

5. In Question 4, point C is called a mid-point of line segment AB. Prove that every line

4. If a point C lies between two points A and B such that AC = BC, then

3. Consider two ‘postulates’ given below: (i) Given any two distinct points A and B, there exists a