Pi Whole Number

Introduction:

The p is a numerical constant value in maths, physics and chemistry. The pi value is equal to 3.141593 in the usual decimal notation and 180 degree for radian. The constant is also known as Archimedes Constant value, even though this name is rather unusual in current, western, English-speaking context. Many of formulae are using the p mathematics, science, and engineering, Pi is one of the mainly used mathematical and physical constant values. In this article we shall discuss about pi whole number.

Example Problems:
Problem 1: Find the area of a circle in the given values. The given diameter value of a circle is 10 cm.

Solution: In the first we are finding the area of the circle. So, we need radius of the circle, but we have only the diameter value of the circle.

Now, we find the radius of the circle.

Diameter of a circle is d = 2 * r

20 cm = 2 * r

r = 20 / 2 cm

r = 10 cm

Now, we have radius value of the circle. So, find the area value of the circle.

Formula for area of a circle is A = ? *r2

A = 3.14 * (10)2 cm

A = 157 cm2

Problem 2: Find the radius of a circle. The area of a circle is 226.08 square meters.

Solution: We are finding the area of the circle. We have radius value so, directly we find area of a circle.

Area of a circle is A = ? * r2

226.08 m2 = 3.14 * r2

r2 = 226.08/3.14

r2 = 72

r = 8.48

Problem 3: Find the radius of a circle. The given value for an area of a circle is 401.92 square meter.

Solution: We are finding the area of the circle. We have radius value so, directly we find area of a circle.

Area of a circle is A = ? * r2

401.92 m2 = 3.14 * r2

r2 = 401.92 /3.14

r2 = 128

r = 11.3

Problem 4: Find the area of a circle. The diameter value of a circle is 32 cm.

Solution: We are finding the area of the circle. So, we need only radius value of the circle, but we have only a diameter value.

Now, we find the radius of the circle.

Diameter of a circle is d = 2 * r

16 cm = 2 * r

r = 32 / 2 cm

r = 16 cm

Now, we have radius value of the circle. So, find the area value of the circle.

Area of a circle is A = ? *r2

A = 3.14 * (16)2 cm

A = 401.92 cm2

Between, if you have problem on these topics Natural Number, please browse expert math related websites for more help on Even Numbers.

Practice Problems:

Problem 1: Find the area of a circle. The diameter value of a circle is 20 cm.

Answer: 10

Problem 2: Find the area of a circle. The diameter value of a circle is 60 cm.

Answer: 30