 Click on  and Project
Open EngineeringSkate ParkBox
Draw the box
 Create each model 100 x 100 is size
Put the origin (point 0) in the centre of the model (-50 to the left, 0 in the middle, and 50 to the right)
Draw  the box in lines  as illustrated...
Draw the triangles
Draw the triangles 
for the box as illustrated...
Press Save to save the model
(click here to go back)
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