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DEVELOPMENT OF SURFACES

DEVELOPMENT OF SURFACES. Ex:1

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DEVELOPMENT OF SURFACES

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  1. DEVELOPMENT OF SURFACES

  2. Ex:1 A pentagonal prism of base 30mm and axis 75 mm is resting on H.P on its base such that a base edge is perpendicular to V.P. A section plane cuts the axis of the prism at a distance of 18 mm from the top face and at angle of 45º with the horizontal. Draw the development of the truncated prism

  3. 2’4’ 1’5’ m m M 3’ K 18 k k H 75 h h X c’ b’d’ a’e’ Y d 30 e c 30 a b 1 1 4 5 2 3 T B C D E A A 4 5 3 1 2

  4. Ex:2 A hexagonal pyramid of base 40mm and axis 120 mm is resting on H.P on its base such that a base edge is perpendicular to V.P. A section plane cuts the axis of the pyramid at a height of 45 mm from the base and at angle of 15º with the horizontal. Draw the development of the truncated pyramid

  5. o’ 126 d1 d2 d3 120 d1 15º 45 126 b’a’ c’f’ d’e’ X Y f a e o 40 b d c A d1 d3 O F d2 d3 M d2 P E J d1 D C 40 B A

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