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1. Line: A tool containing a line on a reel coated with colored chalk powder, used to snap long, straight lines across smooth surfaces.
3. Perfectly vertical; a surface that forms a exact 90-degree angle to the horizon or floor without bowing or slanting.
7. Square: An adjustable layout tool consisting of a steel rule that slides through a head, used for marking and measuring 40-degree and 90-degree angles as well as checking level and plumb surfaces.
8. A term describing a timber or wood surface that has been made smooth using a hand or power tool called a plane.
10. Level: A leveling instrument containing alcohol-filled vials with air bubbles inside, used to check whether a surface is level (horizontal) or plumb (vertical).
11. Angle Square: A compact, cast aluminum tool (also called a speed square or magic square) combining a protractor, try square, and framing square, commonly clamped to lumber as a circular saw guide.

1. Square: A flat, steel L-shaped square commonly used in carpentry (also called a framing square) for squaring up work sections, marking cutting lines, and laying out rafters and stairs.
2. Bob: A pointed metal weight attached to a string that uses gravity to hang motionless to establish a precise, true vertical reference line.
4. Folding Rule: A rigid, hinged measuring stick that folds up, preferred over standard tape measures for taking precise vertical measurements because it stays stiff when extended upward.
5. Measuring Tool: A handheld, battery-powered electronic tool that shoots a laser beam at an object to quickly take and store long or elevated distance measurements.
6. Level: An electronic level that provides a digital readout of degrees of slope and inches-per-foot of rise, often used for setting up roof and stair layouts.
9. Square: A fixed square with legs set permanently at a 90-degree angle, primarily used in woodworking to lay out cutting lines and check surface squareness or warping.