The image below shows a building which is based on a series of intersecting prisms - Leaving Cert DCG - Question A-3 - 2019
Question A-3
The image below shows a building which is based on a series of intersecting prisms. The drawing shows the incomplete elevation and plan of two similar structures whi... show full transcript
Worked Solution & Example Answer:The image below shows a building which is based on a series of intersecting prisms - Leaving Cert DCG - Question A-3 - 2019
Step 1
Location of penetration points on LHS
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Answer
Identify the points where the triangular prism intersects with the irregular pentagonal prism on the left-hand side elevation. Mark these points clearly.
Step 2
Completion of elevation on LHS incl. hidden detail
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Answer
Complete the elevation by adding the outline of the triangular prism while ensuring hidden edges are represented appropriately, using dashed lines.
Step 3
Location of top and bottom penetration points on RHS
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Answer
Determine and mark the points where the triangular prism intersects the irregular pentagonal prism on the right-hand side elevation.
Step 4
Use of appropriate method to determine 'crossover' points
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Answer
Apply the method of projection to accurately find the crossover points between the two prisms where they intersect along their edges.
Step 5
Location of two required crossover points
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Answer
Identify and label two critical crossover points on the drawing for clarity.
Step 6
Completion of plan on RHS incl. hidden detail
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Answer
Finalize the plan view on the right-hand side, incorporating the visible and hidden lines to represent the intersection accurately.
Step 7
Use of appropriate method to determine true shape
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Answer
Utilize the method of true length to determine the true shape of triangle abc, ensuring to establish perpendicular lines to reference the angles accurately.
Step 8
Drawing of required True Shape
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Answer
Draw triangle abc in true shape using the dimensions obtained from the prior analysis, ensuring accuracy in scale and proportion.
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