Answers

  • BS1
  • Ambitious
2015-12-27T06:53:17+05:30
 ● Prism: (i) Area of the lateral faces of a right prism = perimeter of the base × height.

              (ii) Area of the whole surface of a right prism = Area of the lateral faces + 2 × area of the base. 

              (iii) Volume of a right prism = area of the base × height.



● Pyramid: (i) Area of the lateral faces of a right pyramid = (1/2) × perimeter of the base x slant height. 

                   (ii) Area of whole surface of a right pyramid = area of the lateral faces + area of the base. 

                   (iii) Volume of a right pyramid = (1/3) × area of the base × height.



● Tetrahedron: If a be the length of an edge of a regular tetrahedron then

(i) the area of its slant sides = (3√3/4)a2 sq. units;

(ii) the area of its whole surface = √3a2 sq. units

(iii) the volume of the tetrahedron = (√3/12)a3 cu. units.

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