Question

the area of a circle is 124.74 cm^2. find its diameter.​

Answer 1

Given:- area of circle is 124.74cm²

To Find:- diameter of circle

Solution :-

⇒ Area of circle = πr²

⇒ 124.74 = 22/7 × r²

⇒ r² = 124.74×7/22

⇒ r² = 873.18/22

⇒ r² = 39.69

⇒ r = √39.69

⇒ r = 6.3cm

∴ Radius of circle = 6.3cm

Diameter of circle = 2r = 2×6.3 = 12.6cm

Extra information about circle:-

• Perimeter/circumference of circle = 2πr

• Diameter = 2r

• Radius = √[Area/r]

• Area of quadrant = 1/4πr²

• Area of minor sector = (360-ϑ/360)πr²

Answer 2

Answer:

Refer to the above picture for solution.