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DEVELOPMENT OF SURFACES. 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.

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Presentation on theme: "DEVELOPMENT OF SURFACES. 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."— Presentation transcript:

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 XY 30 T 18 a b c d e b’d’c’a’e’ 1’5’2’4’ 3’ H A BCDAE h hk k mm 75 K M 30

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 a b c d e f o b’a’ c’f’ d’e’ o’ XY 15º d1 45 d2 d3 d1 d2 d3 d1 d2 d3 d1 A B C D E A F O P J M


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