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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.

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

•  what is measurement standard?

•  Absolute and Derived Standards

In this page, the formula to find area of a circle is introduced

click on the content to continue..

We have learned the following

•  Length of a real-life object or a line can be a decimal number in which the decimals do not end or do not repeat.

•  Circumference of a circle is pi times the diameter.

Similarly, the area of a circle of 1cm radius is also a decimal number in which the decimals do not end or repeat. It is calculated that the area of a circle is pi xx r xx r or =pir^2.

What is the area of a circle of radius 1cm?

• pi cm
• approximately 22/7 cm
• approximately 3.14cm
• all the above
• all the above

The answer is "all the above"

Area of a Circle :
 = pi r^2

Solved Exercise Problem:

What is the area of a circle of 1/pi cm radius?

• 1cm^2
• 1/pi cm^2
• 1/pi cm^2

The answer is "1/pi cm^2".

Area

=pi r^2

=pi xx 1/pi xx 1/pi

=1/pi cm^2

slide-show version coming soon