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Thought-Process to Discover Knowledge

Welcome to nubtrek.

Books and other education websites provide "matter-of-fact" knowledge. Instead, nubtrek provides a thought-process to discover knowledge.

In each of the topic, the outline of the thought-process, for that topic, is provided for learners and educators.

Read in the blogs more about the unique learning experience at nubtrek.continue
mathsMensuration : Length, Area, and VolumeMensuration: Two Dimensional Shapes

Perimeter: Square, Rectangle, Triangle, Polygons

In the topic "mensuration", the foundation focuses on learning

 •  what is measurement standard?

 •  Absolute and Derived Standards


Finding perimeter of simple figures (squares, rectangle, triangle, polygon) are revised.



click on the content to continue..

Which of the following is a meaning for the word "perimeter"?

  • measure around a shape
  • measure around a shape
  • half of a kind of hot sauce

The answer is "measure around a shape". Perimeter is from the Greek root words peri (around) and meter (measure).

What is the term used to refer "measure around a shape"?

  • Pronunciation : Say the answer once
    Spelling: Write the answer once

The answer is "perimeter".

Which of the following is the measure of length?

  • distance-span between two points
  • distance-span between two points
  • surface-span within a closed shape
  • space-span within a closed solid

The answer is "distance-span between two points"

What is the perimeter of a square of side `4cm`?perimeter of square

  • `4cm`
  • `16cm`
  • `16cm`

The answer is "`16cm`".

Perimeter of a square is `4` times the length of the side.

What is the perimeter of a rectangle of length `6cm` and width `4cm`?perimeter of a rectangle

  • `20cm`
  • `20cm`
  • `10cm`

The answer is "`20cm`".

Perimeter of a rectangle is twice the sum of length and width.

What is the perimeter of a triangle of sides `6cm`, `5cm`, and `4cm`?perimeter of triangle

  • `15cm`
  • `15cm`
  • `30cm`

The answer is "`15cm`".

The perimeter of a triangle is sum of the lengths of the three sides.

What is the perimeter of a polygon of sides, `6cm`, `2cm`, `5cm`, `4cm`, and `6cm` ?perimeter of polygon

  • `23cm`
  • `23cm`
  • `19cm`

The answer is "`23cm`".

Perimeter of a polygon is the sum of the lengths of its sides.

Perimeter :
Perimeter of square `=4 xx text( side)`

Perimeter of rectangle `=2 xx text( length + width)`

Perimeter of triangle `=text(sum of sides)`

Perimeter of polygon `=text(sum of sides)`

Solved Exercise Problem:

What is the perimeter of a equilateral triangle with sides, `1`cm?

  • `1`cm
  • `3` centimeter
  • `3` centimeter

The answer is "`3` centimeter"

Solved Exercise Problem:

What is the perimeter of a rectangle formed by joining `2` squares of side `3` cm?

  • `12`cm
  • `24`cm
  • `18`cm
  • `18`cm

The answer is "`18`cm".

Two squares are joined and the rectangle has length `3+3=6`cm and height `3`cm.
So the perimeter is `2(6+3) = 18cm`.

Solved Exercise Problem:

What is the perimeter of regular pentagon of side `2`cm?

  • `10`cm
  • `10`cm
  • `5`cm

The answer is "`10`cm".

                            
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