Radius Math Term

Introduction to radius math term:

In day to day life, we often came across some unique math terms. Radius is one of the special math terms that falls under this category.
Radius of a circle is nothing but the line segment from the center of the circle to its perimeter. In other terms, half the diameter is the radius.
In this article of radius math term, we are going to find the radius of the circle by several methods. I like to share this Partial Fraction Decomposition Calculator with you all through my article.

Formulas for math term radius:


Radius from circumference:

If the circumference of a circle ( C ) is given, the radius can be calculated by the following formula:

r  = C / 2`pi`

Radius  from diameter:

If the diameter (D) of the circle is given, the formula for finding the radius is

r  = `<< D/2>>`

Radius from area:

If the area of the circle is given, then the radius can be calculated using the formula

r =  `sqrt(A/pi)`

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Example problems for math term radius:


Example 1:

Find the radius, if the circumference of the circle is 90 cm

Solution:

Radius of a circle, r = C / 2`pi`

= 90 / (2 * 3.14)

= 90 / 6.28

= 14.33 cm

Example 2:

Find the radius of the circle, if its diameter is 62 cm.

Solution:

Radius of a circle, r = `<< D/2>>`

= `<< 62/2>>`

= 31 cm

Example 3:

Given the area of a circle is 94 m2. Find its radius.

Solution:

Radius of a circle  r =  `sqrt(A/pi)`

= `sqrt(94/3.14)`

=  5.5 cm


Practice problems for radius math term:


1) Find the radius, if the circumference of the circle is 110 cm.

Answer:  17.52 cm

2) Find the radius of the circle, if its diameter is 92 cm.

Answer: 46 cm

3) Given the area of a circle is 124 m2. Find its radius.

Answer: 6.28 m