Page 115 - Math Genius C5

E:\Working\Orange_Education\Math_Genius_5\Open_Files\CHAP_06
\ 08-Oct-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

List objects from your surroundings having the following geometrical shapes.
1. Straight line: ____________, ____________, ____________, ____________

2. Triangle: ____________, ____________, ____________, ____________

3. Rectangle: ____________, ____________, ____________, ____________

4. Circle: ____________, ____________, ____________, ____________

Basic Geometrical shapes

plane

Look at your notebook page. What do you notice?
It looks like a flat surface, on which we can draw Knowledge Desk

triangles, rectangles and squares. It represents a plane. The word Geometry comes from
Thus, we can say that a smooth flat surface which the ancient Greek words geo
extends endlessly in all directions is called a plane. (meaning “Earth”) and metron
(meaning “measurement”).
A plane has no boundary.

The surface of a wall, the surface of paper, the face of a blackboard and the top of a table
are some examples of planes.

We can draw figures such as a triangle, rectangle, circle, etc., on a plane. So, we call them
plane figures.

point

Take a sharp pencil or a pointed pen and make a dot on a page of your notebook. It
represents a point.

A point shows an exact position or location.
A point has no length, breadth or thickness. It is represented by capital letters A
A, B, C, ..., X, Y, Z.
line segment

Take a sheet of paper and mark two points A and B on it.
A B
Draw a few paths from A to B as shown.

Mathematics-5 113113
Mathematics-5