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How are the terms plumb square and level connected to geometry?
A plumb is a line which tells whether something is vertical. It used to be a string with a lead weight called a plumb bob (from the Latin word plombium, meaning lead) which could be held against vertical structures like walls to test them. A level tests whether a horizontal structure like a floor is perfectly horizontal. Carpenter's levels nowadays use bubbles in clear vials to show when the surface the level is placed on is horizontal. A square is something to measure whether the angle of two things (such as a wall and a floor) is ninety degrees. The connection of the square with geometry is obvious. Whether the corner of a quadrilateral is ninety degrees is important to the definition of a square and a rectangle. Also, if one of the angles of a triangle is ninety degrees, all of the principles of trigonometry apply to that triangle. The plumb and level describe relationships in three-dimensional geometry. Since the earth is (approximately) a sphere, and the plumb bob is pulled by gravity to the centre of the earth, the line described by the plumb is the extension of a radius of the terrestrial sphere. Likewise the level tests lines to see if they are tangent to a point on the surface of the terrestrial sphere or a parallel to that one. A plane which is level contains such a line and is therefore tangent to a point on the surface or parallel to such a plane. A plane which is plumb contains a line which is plumb; the level and plumb planes meet at a ninety degree angle and the line where they intersect is tangent to the surface, or parallel to a tangent.
What is a plumb line?
A plumb line is a weighted string which when hung from a fixed point and allowed to become motionless, indicates perpendicular to level. Perfect for aligning vertically that first piece of wallpaper.
What are measuring tools?
AnswerAnswerThis really can include lots of tools. Things such as tape measure, ruler, plumb bob, level, Line level, and speed square. Levels are really measuring devices, but it is impossible to build a deck or something of that sort without one. Good luck.
What tool tells if a thing is vertical?
A spirit level, also known as a bubble level, is a tool used to determine if a surface is vertical (plumb) or horizontal (level). It contains a liquid-filled vial with an air bubble; when the bubble is centered between the marked lines, the surface is perfectly vertical or horizontal. Other tools that can serve this purpose include a plumb bob and a laser level.
Who invented the plumb line?
It is not known who invented the plumb-line or plumb-bob; there is evidence that it has been in use since biblical times and archaeologists haveÊunearthed what they think are plumb gaugingÊtoolsÊin Ancient Egypt.
What is plumb to a surface?
Plumb as in "Plumb a door frame or cabinet?" Plumb is having something 90 degrees to level. The floor is level and the door frame, the vertical, up and down part is plumb in relationship to that. I'm sure this term comes from using a Plumb Bob. That's a heavy pointed ball on a string.. It will always show you the plumb line. Haven't heard the term used in plumbing.
How do they know the plumb line is vertical?
Use of a plumb bob a level used on plumb rather then horizontal
What is a vertical plumb rod used for?
For measuring 'plumb' in conjunction with a spirit level.
How do you spell plum as in vertically straight?
You're referring to the word 'plumb' - as in plumb line.
Where is the square?
Next to the level, beneath the plumb, Bob.
When something is plumb it is what?
When something is plumb, it is perfectly vertical or upright, aligning directly with the force of gravity. This term is often used in construction and carpentry to ensure that structures are straight and stable. A plumb line, for example, is a tool that helps achieve this vertical alignment. In essence, being plumb indicates that an object is not leaning or tilted.
Can you check plumb with a spirit level?
Yes, that's what it's for.
Is it bad for your fridge freezer not to be plumb its level but not plumb?
hi this is a good game its called roblox and another one mine craft brill. the answer is bad
When an object is plumb it is?
When an object is plumb, it means that it is perfectly vertical and aligned with the force of gravity. This is typically determined using a plumb bob or a level to ensure that the object is straight up and down.
Check a vertical wall frame for plumb?
The easiest way to check walls for plumb is to put a spirit level on the wall. If the bubble is not in the center of the vial, you'll need to find out how far out of plumb the wall is by moving either the top or bottom of the level away from the wall until the bubble finds the center.
How are the terms plumb square and level connected to geometry?
A plumb is a line which tells whether something is vertical. It used to be a string with a lead weight called a plumb bob (from the Latin word plombium, meaning lead) which could be held against vertical structures like walls to test them. A level tests whether a horizontal structure like a floor is perfectly horizontal. Carpenter's levels nowadays use bubbles in clear vials to show when the surface the level is placed on is horizontal. A square is something to measure whether the angle of two things (such as a wall and a floor) is ninety degrees. The connection of the square with geometry is obvious. Whether the corner of a quadrilateral is ninety degrees is important to the definition of a square and a rectangle. Also, if one of the angles of a triangle is ninety degrees, all of the principles of trigonometry apply to that triangle. The plumb and level describe relationships in three-dimensional geometry. Since the earth is (approximately) a sphere, and the plumb bob is pulled by gravity to the centre of the earth, the line described by the plumb is the extension of a radius of the terrestrial sphere. Likewise the level tests lines to see if they are tangent to a point on the surface of the terrestrial sphere or a parallel to that one. A plane which is level contains such a line and is therefore tangent to a point on the surface or parallel to such a plane. A plane which is plumb contains a line which is plumb; the level and plumb planes meet at a ninety degree angle and the line where they intersect is tangent to the surface, or parallel to a tangent.
What is a level called if it is vertical?
A line 90 degrees from horizontal is a plumb line.
