Calculate the area of circle having diameter as 10 cm?

3 Answers
Feb 19, 2018

Answer:

#"Area"=25picm^2~~78.5cm^2#

Explanation:

#"Area of a circle"=pir^2#

#r=d/2=10/2=5cm#

#"Area"=pi*5^2=25picm^2~~78.5cm^2#

Feb 19, 2018

Answer:

See below...

Explanation:

Area of a circle = #pi*r^2#

Where #r# is the radius.

The radius is half of the diameter.

#therefore r = 10/2 = 5cm#

Area = #pi * 5^2 = 25picm^2#

I'd just leave the answer as an exact value unless specified in the question to a certain accuracy.

Feb 19, 2018

Answer:

#"area "=25pi~~78.54" square cm"#

Explanation:

#"the area of a circle is calculated using"#

#• " area of circle "=pir^2#

#"where r is the radius of the circle"#

#"here "d=10rArrr=10/2=5#

#rArr"area "=pixx5^2=25pi~~78.54" square cm"#