Lines, Shapes and Solid

LEARNING OBJECTIVES

This lesson will help you to:-

• understand the basic concept of lines and shapes.
• understand straight and curved lines.
• study various flat shapes and solid shapes.
• understand the way shapes affect movement like rolling and sliding.

QUICK CONCEPT REVIEW

LINE:       ____________________________________

A line is a long thin mark made by a pen, pencil, chalk etc.

TYPE OF LINES

Lines are of two types:

Straight lines    

Curved lines

Everything around us is made of curved lines or straight lines or a combination of both lines.

SHAPES AND SOLIDS

All things around us have shapes. There are 2 types of shapes:-

Flat Shape

Solid Shape

Real Life Examples

Line and shapes are useful in architecture and carpentry.

We see different shapes all around us.

Eg: football, book, pencil

Square, circle, triangle and rectangle are flat shapes. Sphere, cone, cylinder, cube and cuboid are solid shapes.

FLAT SHAPES

SOLID SHAPES  

FLAT SHAPES

Squares, triangles, rectangles, circles, and lines can be drawn on a piece of paper.

Most of them have sides and corners but circle has neither side nor corner.

1. SQUARE

Square has four sides and four corners.

E.g.  Chess board.

2. RECTANGLE

A rectangle has four sides and four corners.

The longer side is called length.

The shorter side is called breadth.

E.g. Door.

3. TRIANGLE

A triangle has three sides and three corners.

E.g. A pizza slice.

4. CIRCLE:

A circle is round and has no side.

E.g. A circular plate.

5. OVAL

An oval has no sides.

E.g. An egg.

We will study about solid shapes in the next class.

ROLLING AND SLIDING

Have you noticed that some objects roll while some slide?

When we push round objects like ball, etc., they roll. When we push flat objects like book, dice etc., they slide. Do you know the reason?

This is because a ball has a curved or round surface that is why a ball rolls.

A dice has flat surface that is why a dice slides.

Observe different objects at your home or school and try to identify their shapes. Discuss your observations with your family, friends and teachers.

Amazing Facts

Have you seen any pyramid?

A pyramid is a structure which has triangular face. These triangular faces merge to a point at the top.

The base of pyramid can be rectangle, square etc.