Orthographic Projection- Example

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Draw following orthographic views by first angle projection method:
a) Front view from direction X
b) Top view
c) Left Hand Side View
Solution

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Inscribe a Heptagon in a Circle

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Inscribe a regular heptagon in a circle of diameter 60 mm Heptagon Inscribed in a circle Draw a circle of diameter 60mm. Draw a diameter line AB. By taking center A and radius AO, draw an arc EF. Draw a straight line EF, intersecting the line AB at point G. Length GE or GF is the representing length of sides of pentagon. Therefore, by taking distance equal to EG in the compass, make seven equal divisions 1, 2, 3, 4, 5, 6 and 7 on the circle. Join all the divisions by straight lines and obtain the heptagon.
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