This post explains about step by step instruction for drawing the isometric projection of a pentagonal prism.
Let’s consider the isometric projection is to be drawn for pentagonal pyramids of base side 40 mm and axis height 80 mm resting base on HP with an axis of the prism perpendicular and one of its base edge is perpendicular to VP.
1. Draw the Pentagon with the base of the solid 40 mm resting on HP and base edge perpendicular to V.P
2. Draw the centre of the helping figure and enclose the helping figure in a suitable rectangle.
3. Transfer the co-ordinates of a centre to the sides of the enclosing rectangle with centre lines.
4. Name the points as shown in the helping figure
5. Draw the principal axis OA and OB inclined at 30° to the horizontal base line
6. Copy the length of sides of helping figure's rectangle on the respective principal axis
7. Draw the vertical axis of length 80 mm in an upright position from the centre point.
8. Join the visible edges starting from the vertex to base corners by thick lines.
9. Complete the isometric projection with dimensioning and direction of viewing.
Let’s consider the isometric projection is to be drawn for pentagonal pyramids of base side 40 mm and axis height 80 mm resting base on HP with an axis of the prism perpendicular and one of its base edge is perpendicular to VP.
1. Draw the Pentagon with the base of the solid 40 mm resting on HP and base edge perpendicular to V.P
2. Draw the centre of the helping figure and enclose the helping figure in a suitable rectangle.
3. Transfer the co-ordinates of a centre to the sides of the enclosing rectangle with centre lines.
4. Name the points as shown in the helping figure
5. Draw the principal axis OA and OB inclined at 30° to the horizontal base line
6. Copy the length of sides of helping figure's rectangle on the respective principal axis
7. Draw the vertical axis of length 80 mm in an upright position from the centre point.
8. Join the visible edges starting from the vertex to base corners by thick lines.
9. Complete the isometric projection with dimensioning and direction of viewing.
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