For a circle Area is defined as: A = π(r)2 Where "A" is the area, "r" is your radius and π = 3.14 So for your circle: A = 3.14 x (15)2
If 15cm is the diameter then the radius is 7.5cm If the circumference is 15cm then the radius is 7.5/pi cm
When you try to figure out an area of a circle, you square the radius, then multiply it by pi to get the area of a circle. A radius square is radius x radius, or radius squared.
The area of any circle is (pi) x (radius)2 .The area of half the circle is just half of that number.
A circle with a radius of 2.5 meters has an area of 19.63 square meters.
A circle with a radius of 3 meters has an area of 28.27 square meters.
706.5 cm
What’s the answer
If 15cm is the diameter then the radius is 7.5cm If the circumference is 15cm then the radius is 7.5/pi cm
The radius is 1.27cm
Diameter = Radius*2 = 30 cm.
The surface area of a cylinder where height is 80cm and radius is 15cm equals 8953.54cm2
The surface area of a 15cm plate can be calculated using the formula for the surface area of a circle, which is A r2. Since the plate is circular, the radius (r) would be half of the diameter, which is 15cm. Therefore, the surface area would be A (7.5)2 176.71 square centimeters.
7.5cm (r = d/2)
double the radius to get the diameter = 30 multiply by pi (3.1415...) = 92.245 cm
ANUS
Area = (pi) (radius)2 = 225 pi = 706.858 square centimeters (rounded)
Using 3.14 as Pi the area of circle is: 379.94