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.
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.
Which one of the following options has two angles?
(a) 
(b) 
(c) 
(d) 
Answer (a)
Explanation: Option (a) is correct because it has three lines meeting at two points making 2 angles.
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.
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.
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