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2. A "Top View" drawing that shows the layout of rooms, walls, and doors.
5. A specialized triangular ruler with different ratios used for drafting.
6. How close a measurement is to the true value.
7. A technical drawing or reproduction used by builders (originally blue/white).
10. A drawing that "slices" through a building to show the insides of walls.
11. A method of drawing a 3D object using flat 2D views (Top, Front, Side).
13. The lines on a ruler representing fractions of an inch.
14. A thin line with arrows that shows the measurement of an object.
15. A measurement of Area (Length×Width). Used for flooring and paint.
16. A dashed line (−−−) representing an edge that is not visible.
18. A numerical value on a drawing that defines the size or location of an object.
19. A measure of how well a material resists heat flow (Insulation).
20. A measurement of length only (used for buying lumber or trim).

1. The US measurement system using Feet, Inches, and Fractions.
3. A thick, dark line that represents the physical outline of an object (Walls).
4. The ratio of the drawing size to the real-world size (e.g., 1/4"=1′−0").
8. The level of detail in a measurement (e.g., measuring to the 1/32").
9. The international measurement system based on the number 10 (Meters).
12. The acceptable amount of variation or "error" allowed in a design.
17. A "Front View" drawing that shows the height and exterior design of a building.