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Category : 1st Class

                                                                      Geometrical Shapes

Geometrical Shapes 

In this chapter, we will know about the basic geometrical shapes, which we often see around us.

Line

A line is a collection of points. The lines may be straight or curved.

See the picture of lines given below:

1. Straight lines

2. Curved lines

Angles

When two lines meet at a point, an angle is formed.

See the following figures:

                      (i)                    (ii)

These are angles.

• Example:

Which one of the following is not an angle?

(a)                       (b)

(c)                      (d) 

(e)   None of these

Answer (d)

Explanation: Option (d) is correct because in (d), two lines do not meet to make an angle.

Triangle

A triangle has three sides and three angles. Let's see the following figures:

Quadrilateral

Quadrilateral has four sides and four angles. Let's see the following figures:

Thus it is clear that a quadrilateral has four sides whether they are equal or not.

Rectangle

A rectangle has equal angles and equal opposite sides. Let's see the following rectangles:

Square

Square has 4 equal sides and 4 angles. Let's see the squares given below:

Rhombus

Rhombus is a quadrilateral in which all four sides are equal. Let's see the pictures of rhombus given below.

• Example:

How many lines are required to make 2 square?

(a) 4                                          (b) 8

(c) 12                                        (d) 3

(e) None of these

                        Answer (b)

                        Explanation: Option (b) is correct because one square has 4 lines. So 4 + 4 = 8 lines are required to make 2 squares.