Example 3 on Projection of Plane Surfaces

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A triangular lamina of 25 mm sides rests on one of its corners on VP such that the median passing through the corner on which it rests is inclined at 30 degrees to HP and 45 degrees to VP. Draw its projections.
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Shouldnt the namings of the final drawing not have dashes ?? Since its top view

happytime
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Sir how do we know when we should find beta angle?

lethalleon