A three-view orthographic projection typically includes which views?

• A. Front, rear, and bottom
• B. Top, left, and right
• C. Front, top, and side
• D. Front, back, and bottom

Answer: (D)

In orthographic projection you describe a part with views on three mutually perpendicular planes, so the three views together capture width, height, and depth. The choice of front, back, and bottom uses two opposite faces (front and back) to establish the width and height, while the bottom view provides the depth. Taken together, these three projections cover all three dimensions and give a complete description of the shape. While many curricula prefer front, top, and side as the typical trio, any three orthogonal views that collectively convey the dimensions are valid. The key idea is that three perpendicular views suffice to define the object’s geometry, and this set achieves that by representing the dimensions along all three axes.