Tape measure
A caliper.
It is a protractor that measures angles.
Protractor
The semi-circle ruler is commonly known as a protractor. A protractor is a geometric tool used to measure and draw angles. It typically has a half-circle shape with degree markings along the curved edge.
Polygonal surfaces are geometric structures composed of flat, polygon-shaped facets, typically forming a three-dimensional shape. These surfaces are commonly used in computer graphics, modeling, and CAD applications due to their simplicity and ease of rendering. Each polygon is defined by its vertices, edges, and faces, allowing for the representation of complex shapes through the combination of multiple polygons. They are foundational in 3D modeling, as they can approximate curved surfaces through a sufficient number of polygons.
A tape measurer can be used to measure distance in linear or even around curved surfaces. It is an old tool that has a neat history. See the related link for more information.
A caliper or a micrometer is typically used to measure curved lines in a laboratory setting. These instruments provide precise measurements of the length or diameter of curved objects such as tubes or spherical surfaces.
A chamfer is a beveled edge that joins two surfaces. The tool used to measure a chamfer would be a caliper.
a hammer
A spokeshave is a woodworking tool used for shaping and smoothing curved surfaces, such as chair legs or boat oars. It has a blade that can be adjusted to different angles to remove thin shavings of wood.
Angle finder tools are typically used to measure the angle between two surfaces or the slope of a surface. To use one, place the tool between the two surfaces you want to measure and adjust it until it aligns with the angle. You can then read the angle measurement displayed on the tool's scale.
A spoke shave is a woodworking tool used to shape and smooth curved surfaces on wood. It has a blade that is adjustable and can be used to shave off thin layers of wood to create intricate designs or smooth out rough edges. It is commonly used by woodworkers to shape chair legs, handles, and other curved wooden pieces.
Why weather tool is used to measure wind direction
Two instruments that could be used to measure curved lines are a flexible ruler and a caliper. A flexible ruler, also known as a contour gauge, can be molded to the shape of the curved line to measure its length accurately. A caliper, specifically a vernier caliper, can be used to measure the diameter or thickness of a curved object by gently gripping and measuring across the curve.
a milling machine is used to mill holes and also to smothern surfaces and do curved cuts
An adze is a cutting tool with a curved blade set at a right angle to the handle, and used in shaping wood.
A spokeshave is a woodworking tool used for shaping and smoothing curved surfaces, such as chair legs or boat hulls. It can also be used for trimming and shaping edges, as well as for creating intricate designs and details on wood pieces.