 Click on  and Project
Open EngineeringSkate ParkGround
Draw the ground
 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 ground as a flat square as illustrated...
Press Save to save the model
(click here to go back)
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