# 2.1 Modern measuring instuments

 Page 1 / 3

## Modern measuring instruments

Measure and draw with modern measuring instruments

## [lo 1.3]

Measure the lengths in mm of the indicated line sections in the following sketch.

Which measuring-instrument is the most suitable?

Hint for the Teacher:

Allow a margin of ± 2 mm to both sides, but encourage learners to measure accurately all the same.

Background:

What is a line section?

The line sections used to compile the sketch above are mainly HORIZONTAL, VERTICAL, DIAGONAL (slanting) or CURVED.

What is a horizontal line?

What is a vertical line?

What is a diagonal line?

What is a curved line?

## [lo 1.3]

1. Write down the letters of any three horizontal lines in the sketch.
2. How many diagonal lines are there in the sketch?
3. Write down the letters of any two vertical lines in the sketch.
4. Draw over the HORIZONTAL lines in red, the VERTICAL lines in blue and the DIAGONAL lines in green in the sketch.
5. What kind of line is (k)? Can you measure the length of (k)?

How?

## [lo 1.3]

Using a ruler and the four kinds of lines, design and draw any object on squared paper.

## [lo 1.8]

a. Draw a horizontal line of 50 mm with your ruler. Follow the instructions

1. Draw a horizontal line across the page (about 150 mm).
2. Make a little vertical mark on the left of the horizontal line.
3. Place your ruler on the mark.
4. Measure 50 mm and make a small vertical mark on the right.
5. Write 50 mm under the measured line section.

b) Draw a diagonal line of 70 mm with your ruler. Follow the instructions given above.

## [lo 1.3]

Draw a line parallel to each of the following:

Background:

Complete: The point where two lines meet, is called a .The size of an angle is measured in DEGREES and we use a PROTRACTOR to measure the size of an angle.

When a vertical line meets a horizontal line perpendicularly, a __ is formed. The size of such an angle is 90 o .

A line section can also be called a STRAIGHT ANGLE. The size of such an angle is 180 o .

When an angle is between 0 o and 90 o , it is called an ACUTE ANGLE and when an angle is between 90 o and 180 o , it is called an OBTUSE ANGLE.

## [lo 1.2]

Write down what kind of angle each of the following is:

Hint:

Turn the page so that one side of the angle is horizontal, and decide then.

## [lo 1.3]

a. A right angle

b. An acute angle

c. An obtuse angle

Background:

If we combine certain line sections with the above-mentioned three angles, we get GEOMETRICAL FIGURES. They are also called two-dimensional shapes, because they are flat shapes or planes. Lines that are one-dimensional are used in drawings to form two-dimensional shapes or planes. Most two-dimensional figures have two dimensions, namely length and breadth.

## [lo 1.2]

Can you recognise these basic geometrical figures?

find the 15th term of the geometric sequince whose first is 18 and last term of 387
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
hmm well what is the answer
Abhi
how do they get the third part x = (32)5/4
can someone help me with some logarithmic and exponential equations.
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
hmm
Abhi
is it a question of log
Abhi
🤔.
Abhi
Commplementary angles
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
a perfect square v²+2v+_
kkk nice
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
rolling four fair dice and getting an even number an all four dice
Kristine 2*2*2=8
Differences Between Laspeyres and Paasche Indices
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
how do you translate this in Algebraic Expressions
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
what's the easiest and fastest way to the synthesize AgNP?
China
Cied
types of nano material
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
what is nano technology
what is system testing?
preparation of nanomaterial
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
what is system testing
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
how did you get the value of 2000N.What calculations are needed to arrive at it
Privacy Information Security Software Version 1.1a
Good
Got questions? Join the online conversation and get instant answers!