How to use Conversation Awareness and Live Listen on AirPods
At first glance, AirPods look just like any other true wireless earbuds. But that all changed when a few little-known features were discovered.
Formula for calculating the area of a circular sector
Circular sector is a very special geometric form in plane geometry. The following article introduces to you the concept of what a sector is, the formula for calculating the area of a circular sector, and the circumference of a circular sector. Please refer to it.
Round fan shape
- What is a fan shape?
- Formula for calculating the area of a fan
- Formula for calculating the circumference of a circular sector
- Example of calculating the area of a circular sector, the circumference of a circular sector
What is a fan shape?
The shape bounded by two radii OA, OB and circular arc AB as shown below is called a circular sector.
So a sector is a part of a circle bounded by two radii and an arc.
Formula for calculating the area of a fan
Let S be the area of a circular sector, then the formula for calculating the area of a circular sector has 2 expressions:
or
In there:
Sis the area of a circular sectorRis the radius of the circle, as in the picture then R = OA = OBℓis the arc length, according to the figure, ℓ has the same length as arc AB.
Formula for calculating the circumference of a circular sector
The formula for calculating the perimeter of a circular sector is determined by the formula:
In there:
Cis the circumference of the fanRis the radius of the circle with center Oℓis the arc length
Example of calculating the area of a circular sector, the circumference of a circular sector
Lesson 1 :
Calculate the area of a circular sector when radius R = 5 cm, angle n = 30º.
Solution : Applying the formula for calculating the area of a fan, we have:
Lesson 2 :
Calculate the area of a circular sector when knowing the radius R = 7 cm, arc length ℓ = 5 cm.
Solution : Applying the formula for calculating the area of a fan, we have:
Lesson 3:
Calculate the perimeter of a sector with area 8 cm2 and arc length 5 cm.
Solution : We have:
Based on the formula for calculating the perimeter of a fan, we have: C = 2R + ℓ = 2.3.2 + 5 = 11.4 (cm).
Also don't miss the series of articles on calculating the area of a circle , the area of a pyramid and a series of other shapes.
How to regain access to hard drive, fix error of not being able to open hard drive
In this article, we will guide you how to regain access to your hard drive when it fails. Let's follow along!
How to use dental floss
Dental floss is a common tool for cleaning teeth, however, not everyone knows how to use it properly. Below are instructions on how to use dental floss to clean teeth effectively.
How to gain muscle according to experts
Building muscle takes time and the right training, but its something anyone can do. Heres how to build muscle, according to experts.
The Best Diets for Heart Health
In addition to regular exercise and not smoking, diet is one of the best ways to protect your heart. Here are the best diets for heart health.
How to cure insomnia for pregnant women in the last 3 months
The third trimester is often the most difficult time to sleep during pregnancy. Here are some ways to treat insomnia in the third trimester.
Scientifically Proven Ways to Automatically Burn Calories
There are many ways to lose weight without changing anything in your diet. Here are some scientifically proven automatic weight loss or calorie-burning methods that anyone can use.
All about iOS 26
Apple has introduced iOS 26 – a major update with a brand new frosted glass design, smarter experiences, and improvements to familiar apps.
Yoga exercises to treat insomnia
Yoga can provide many health benefits, including better sleep. Because yoga can be relaxing and restorative, its a great way to beat insomnia after a busy day.
What is the flower of the other shore? Meaning and legend of the flower of the other shore
The flower of the other shore is a unique flower, carrying many unique meanings. So what is the flower of the other shore, is the flower of the other shore real, what is the meaning and legend of the flower of the other shore?
Healthy snacks that help you lose weight
Craving for snacks but afraid of gaining weight? Dont worry, lets explore together many types of weight loss snacks that are high in fiber, low in calories without making you try to starve yourself.
What to do when you have trouble sleeping?
Prioritizing a consistent sleep schedule and evening routine can help improve the quality of your sleep. Heres what you need to know to stop tossing and turning at night.
How to add a printer to Windows 10
Adding a printer to Windows 10 is simple, although the process for wired devices will be different than for wireless devices.
The most commonly deficient nutrients in the diet
Diet is important to our health. Yet most of our meals are lacking in these six important nutrients.
How to get beautiful nails quickly
You want to have a beautiful, shiny, healthy nail quickly. The simple tips for beautiful nails below will be useful for you.