Example 05 on Projection of Plane Surfaces

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A triangular plane lamina of sides 25 mm is resting on HP with one of its corners touching it, such that the side opposite to the corner on which it rests is 15 mm above HP and makes an angle of 30 degrees with VP. Draw the top and front views in this position. Also, determine the inclination of the lamina to the reference plane.
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An equilateral triangle of 60 mm side is resting in VP on one of its side. Then its surface is inclined to VP at an angle of 40°. Draw the projections of plane, if the resting side is inclined to HP at an angle of 30 °. Find the inclination made by plane with HP.

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