Question

If the area of circle is 616cm²,find it's circumstances.
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Answer 1

Step-by-step explanation:

If the area of circle is 616cm²,find it's circumstances.

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Answer 2

Question:

• If the area of circle is 616cm², find its circumference.

To Find:

• Circumference of the circle = ?

Solution:

Area of circle = 616cm²

$\therefore \pi r^2 = Area\: of\: circle$

$\implies \frac{22}{7}\times r^2 = 616$

$\implies r^2 = 616\div\frac{22}{7}$

$\implies r^2 = 616\times\frac{7}{22}$

$\implies r^2 = 196$

$\implies r = \sqrt{196}$

$\implies r = 14$

Hence, Radius of the circle = 14cm

Circumference = $2\pi r$

$= 2\times\frac{22}{7}\times14$

$= 88cm$

Hence, circumference of the circle = 88cm

Extra Information:

• Perimeter of square = (side×4)units
• Area of square = (side²) sq. units
• Perimeter of rectangle = 2(l + b) units
• Area of rectangle = (l × b) sq. units
• Perimeter of triangle = Sum of all sides
• Area of triangle = $\Big(\frac{1}{2}\times base \times height\Big) sq. \;units$

• Circumference of circle = (2πr)units
• Area of circle = (πr²) sq. units