Understand Element Shapes
Category : 6th Class
Understanding Elementary Shapes
1 Revolution = 1 Complete angle
1 Straight angle \[=\frac{1}{2}\](Complete angle)\[=\frac{1}{2}\]\[\times \]
\[{{360}^{o}}\]= \[{{180}^{o}}\]
(ii) Obtuse Angle: An angle between \[{{90}^{o}}\]and \[{{180}^{o}}\]is called an obtuse angle.
(iii) Reflex Angle: An angle between \[{{180}^{o}}\]and \[{{360}^{o}}\]is called a reflex angle.
(b) Rectangle: A parallelogram whose each angle measures 90°.
(c) Rhombus: A parallelogram with all sides equal.
(d) Trapezium: A quadrilateral with one pair of opposite sides parallel.
(e) Square: A rhombus with 4 right angles.
Space figure (Three – dimensional)
S. No. 
Name the figure 
Figure 
Description 
Components 
Examples 
1. 
Cuboid 

A Cuboid resembles a rectangular box. 
Face : 6 Edges :12 Vertices :8 

2. 
Cube 

A cube is a cuboid whose edges are all of equal length. 
Face : 6 Edges :12 Vertices :8 

3. 
Triangular prism 

A triangular prism resembles a kaleidoscope. It has triangular bases. 
Face : 5 Edges : 9 Vertices :6


4. 
Triangular pyramid or Tetra  hedron 

It has a triangular base.

Face : 4 Edges : 6 Vertices : 4 

5. 
Square Pyramid 

It has a square as its base.

Face : 5 Edges : 8 Vertices : 5 

6. 
Cylinder 

It has a circular base of radius \['r'\] and height \['h'\].

radius \['r'\] slant height \['l'\] Perpendicular height \['h'\] 

7. 
Cone 

It has a circular base of radius \['r'\] and height \['h'\].

radius \['r'\] slant height \['l'\] Perpendicular height \['h'\] 

8. 
Sphere 

No flat face. 
radius \['r'\] Face : 1 Edges : 0 Vertices : 0 

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