Question

Find the area and perimeter of the circles with following: Radius = 2.8cm

Answer 1

The Area of a Circle with radius r = πr² 
∴ The Area of a Circle with radius 2.8cm 
= π(2.8)²

= `(22)/(7)(2.8)^2`
= 24.64cm2
The Circumference of a Circle with radius r = 2πr
The Circumference of a Circle with radius 2.8
= 2π(2.8)

= `2 xx (22)/(7)(2.8)`
= 17.6cm.