Friday, June 7

Real Size Ruler

Let us know about real size ruler.Ruler is an instrument, using this instrument we can draw the line, those lines are straight and also very neat, size of the ruler depends on the separation (they are separated in cm and inches).In real life we are using the ruler in many places.Type s of rulers are
  • Desk ruler
  • Practical ruler.
Is this topic The Real Numbers hard for you? Watch out for my coming posts.

Desk ruler-real size ruler:

Desk ruler is used for three purposes and size of the ruler is12 inches or 30 cm
  • Drawing
  • The diagram should be straight and
  • Cutting the things into straight line

Practical ruler –real size ruler:
Practical  ruler is used for measuring the distance,  all the carpenter use this kind of ruler The lenght of the ruler is 5 meter or 2 meter(metal tape measure)
Real size ruler diagram:
The diagram of the ruler is shown below, (separation in both inches and centimeter)
 ruler

Using the ruler we can draw the line and also measure the line

Example problem-real size ruler


Example 1:
Draw the 5cm line using the real size desk ruler?
Solution:
The above diagram shows the how the desk ruler look like, we can construct desk ruler in both the plastic and wood. Using this ruler we can draw the line with 5cm

Ruler

Mark 0(starting point to the ruler) and mark 5 on ruler (ending point),then draw the straight line .we get line as 5 cm length.

 Example 2:
Draw 11cm using the real size desk ruler?
Solution:
Desk ruler has the value from 0 to 20 , using the desk ruler we can draw a straight line ,mark 0 on the ruler (we call as starting point ) and mark 11 on the ruler (we call as ending point ) then connect those two points we get the straight line with the measure of 11cm.

Ruler

I am planning to write more post on  10th model question paper samacheer kalvi. Keep checking my blog.


Rulers in different units

Rulers come in different units like:
  • Fractional Inch
  • Decimal Inch
  • Metric
Metric rulers are fairly easy to read. They deal with centimeters and millimeters only.
Steps:

  1. Decide if we have a metric or an English ruler. Metric rulers have numbers every centimeter, and English have them every inch. Centimeters are much smaller than inches, so metric rulers will have a lot more numbers printed on them. If we still have trouble telling what type of ruler you have, centimeters are normally about as wide as one fingertip, and inches are about as wide as two.
  2. Read an English ruler using fractions of an inch. The distance between any two large numbered lines is 1 inch. The large unnumbered line that is halfway between them is 1/2 inch. The smaller (but still prominent) line between the 1/2 mark and the numbered inch line is 1/4 inch. The tiny little lines between all of the more prominent lines are 1/16 inch.
  3. Observe the much simpler metric rulers. The distance between any two large numbered lines is 1 cm. The prominent line between any two numbered lines is 1/2 cm. The small lines between the 1/2 mark and the numbered centimeter mark are 1/10 cm, otherwise known as a millimeter.
  4. Record distances by the name of the line that it most closely matches. If the length of an object goes to one mark past the halfway mark on your ruler then it will be 9/16 inch on an English ruler or 6/10 cm (or 6 mm) on a metric ruler.

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