Question

A point is 20 mm below the H.P. and 30mm behind the V.P. Draw its projection

Answer 1

Answer:

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Answer 2

Given:  A point is 20 mm below the H.P. and 30mm behind the V.P

Explanation:

• To convert the projections a’ and a received in the

        pictorial view into orthographic projections:

• After rotation, the primary quadrant is opened out and the

        H.P. occupies the position (dotted lines) vertically

        under the V.P.

• Also, the point a on H.P. will trace on quadrant of a circle with o as centre and oa as radius.

• Now a occupies the position simply under o.
• Here the line joining a’ and a , known as the projector, is perpendicular to XY.  
• Front view : Draw the XY line and draw a projector on any point . Mark a’ 20 mm above XY.

• Top view : On the identical projector. Mark a 30 mm

         under XY.