Which is approximately equal to the area of the circle

Therefore, the area of the circular table is about It's clearly marked that the larger circle has a radius 11 cm. So, its area is.

What about the smaller circle? So, the radius of the smaller circle is 3. To get the area of the shaded region, subtract the area of the smaller circle from the area of the larger circle.

Therefore, the area of the shaded region is about Names of standardized tests are owned by the trademark holders and are not affiliated with Varsity Tutors LLC.

Media outlet trademarks are owned by the respective media outlets and are not affiliated with Varsity Tutors. The area of a circle is the amount of space enclosed within the boundary of a circle. The region within the boundary of the circle is the area occupied by the circle. It may also be referred to as the total number of square units inside that circle.

The area of a circle can be calculated in intermediate steps from the diameter, and the circumference of a circle.

From the diameter and the circumference, we can find the radius and then find the area of a circle. But these formulae provide the shortest method to find the area of a circle.

Example1: If the length of the radius of a circle is 4 units. Calculate its area. Answer: The area of the circle is Example 2: The length of the largest chord of a circle is 12 units. Find the area of the circle. Here 'd' is the diameter of the circle.

The diameter of the circle is twice the radius of the circle. Generally from the diameter, we need to first find the radius of the circle and then find the area of the circle.

With this formula, we can directly find the area of the circle, from the measure of the diameter of the circle. There are two simple steps to find the area of a circle from the given circumference of a circle. The circumference of a circle is first used to find the radius of the circle. This radius is further helpful to find the area of a circle. But in this formulae, we will be able to directly find the area of a circle from the circumference of the circle.

The area of the circle can be conveniently calculated either from the radius, diameter, or circumference of the circle. Any of the values of pi can be used based on the requirement and the need of the equations. The below table shows the list of formulae if we know the radius, the diameter, or the circumference of a circle. To understand this, let's first understand how the formula for the area of a circle is derived.

Observe the above figure carefully, if we split up the circle into smaller sections and arrange them systematically it forms a shape of a parallelogram. When the circle is divided into even smaller sectors, it gradually becomes the shape of a rectangle.

The more the number of sections it has more it tends to have a shape of a rectangle as shown above. The surface area of a circle is the same as the area of a circle. In fact, when we say the area of a circle, we mean nothing but its total surface area.

Surface area is the area occupied by the surface of a 3-D shape. The surface of a sphere will be spherical in shape but a circle is a simple plane 2-dimensional shape. If the length of the radius or diameter or even the circumference of the circle is given, then we can find out the surface area.

It is represented in square units. Calculate the area of the pizza that was ordered by Ron. A pizza is circular in shape. So we can use the area of a circle formula to calculate the area of the pizza. Example 1: Find the circumference and the area of a circle whose radius is 14 cm. Example 2: The ratio of the area of 2 circles is I plotted all three of these functions on Wolframalpha, and the graphs do appear to be relatively identical when the range on the x-axis is large.

In both cases, they're aren't exactly equal. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Ask Question. Asked 4 years, 10 months ago. Active 4 years, 10 months ago. Viewed times.