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The 3D graphic shows a bicycle shelter - Leaving Cert DCG - Question A-1 - 2018
Question A-1
The 3D graphic shows a bicycle shelter. The drawing shows an incomplete dimetric projection of a similar shelter using the axonometric axes method. The horizontal pl... show full transcript
Worked Solution & Example Answer:The 3D graphic shows a bicycle shelter - Leaving Cert DCG - Question A-1 - 2018
Step 1
Complete the axonometric projection of the bike shelter.
Answer
To complete the axonometric projection for the bike shelter, follow these steps:
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Location of four points on right hand end in axonometric view:
- Begin by identifying and plotting four key points located on the right-hand end of the bike shelter. Denote these points clearly in the axonometric view to establish the structure's integrity.
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Complete right hand end:
- Next, connect the four points using straight lines to form the triangular and rectangular geometries that represent the right-hand end. Ensure that angles adhere to axonometric rules, typically maintaining a 30-degree inclination for the projection.
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Complete roof structure:
- Construct the roof by connecting the uppermost points of the right end with points of the left end to form the upper surface of the shelter. Add appropriate lines to indicate the slope and peak of the roof, respecting the established angles.
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Determine Back, Front & Top lines on inner dividers:
- Finally, determine the lines for the back, front, and top structures of the shelter. Use the internal dividers to maintain spatial coherence, ensuring that each segment is visually reasonable in the axonometric view.
Step 2
Show point of impact of the ball with the glass roof in axonometric view.
Answer
To determine the point of impact in the axonometric view:
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Join YB in elevation (XY plane) or axonometric view:
- Draw the line connecting points Y and B in either elevation or axonometric view. This line represents the trajectory of the football in two dimensions.
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Join YB in end view (YZ plane) or axonometric view:
- Similarly, represent the line YB from an end view perspective. This will provide insight into the impact dynamics from a different visual angle.
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Location of required point of impact in axonometric view:
- Finally, analyze the two drawn lines to determine the intersection point, which signifies where the football would impact the glass roof. Mark this point clearly in the axonometric projection, ensuring it matches the expected height and location based on the derived trajectories.