Test: Euclid's Geometry - Class 9 MCQ

Correct Option is A. Radius

if the points are collinear then only 1 line can pass through 3 points  as colinear mean the points which are on same line.

 According to the definition of parallel lines “lines are parallel if they do not intersect”. They are not intersecting. Definition: a statement that gives the exact meaning of the given word. Hence, 'lines are parallel if they do not intersect' is stated in the form of definition.

Things which are double of the same things are equal to one another.
Example : 
1. If 2x = 2y then x = y.
2. If a = b, then 2a = 2b

The correct answer is C: infinite.

Here's why:
- In geometry, through a single point, an infinite number of lines can pass.
- This concept is a fundamental property of Euclidean geometry.
- Imagine a point as the intersection of multiple lines, where each line extends infinitely in both directions.
- Therefore, the correct answer is that an infinite number of lines can pass through a single point.

Theorum is a statement which can be proved. Axiom is universly accepted by all and do not require a proof. Postulate is same a Axiom but used for geometry.

• The edges of a surface are defined by lines where two surfaces meet.
• Plans refer to flat surfaces, not edges.
• Points are the smallest units in geometry but do not define edges.
• Rays extend infinitely in one direction, but do not represent edges.
• Thus, lines, which are made up of multiple points, are the correct representation of edges of a surface.

A solid has shape, size, position and can be moved from one place to another. So, solid has three dimensions

 A point is that which has no part i.e., no length, no breadth and no height. So, it has no dimension.

 Boundaries of a solid are called surfaces. A surface (plane) has only length and breadth. So, it has two dimensions.