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A plane is the flat surface of an object.There are three types,horizontal plane,vertical plane and inclined plane.

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A straight line that is perpendicular or that forms a right angle to any line on the plane.

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How to make sure the Orthogonal Projection is correct?

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How to make sure the Orthogonal Projection is correct?

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How to draw a plan and elevations of an object to scale?

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How to draw a plan and elevations of an object to scale?

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A right prism with rectangle ABCD

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Example of solution