Question

A line AB of 25 mm long is perpendicular to the V.P. and

parallel to the H.P. The end point A and B of line are 10 mm

and 35 mm in front of V.P. respectively. The line is 20 mm

above the H.P. Draw its projection​

Answer 1

To draw the projection of line AB, we first need to understand the concept of the principal planes and how they relate to the line.

The principal planes are two imaginary planes that intersect at a right angle and pass through the point of observation (V.P.) and the point of intersection of the lines of sight (H.P.). The vertical plane is called the "V.P." and the horizontal plane is called the "H.P."

Given that the line AB is perpendicular to the V.P. and parallel to the H.P, we can represent it by two points A and B in the projection. The point A is 10mm in front of the V.P and 20mm above the H.P and point B is 35mm in front of the V.P and 20mm above the H.P

A = (10, 20) and B = (35, 20)

To draw the projection, we can connect the two points A and B with a straight line.

We can represent it in a 2D Cartesian coordinate system, where x-axis represents the horizontal distance (left or right) from the V.P and y-axis represents the vertical distance (up or down) from the H.P

So, the projection of line AB will be a straight line from point (10, 20) to point (35, 20) in the 2D cartesian coordinate system.

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