How to Find the Area of a Sector of a Circle | Geometry, Circle Sectors, Sector Area
How do we find the sector area of a circle? Sector area can be calculated in a few ways, and we go over two in today's geometry lesson!
To find the area of a sector, remember the beautiful proportionality present in circles! Let's say we are trying to find the area of a sector in a circle with radius r. Suppose the central angle between the two radii that create the sector has a measure of t degrees. Suppose the arc cut by the angle has a length of s. Then, the following equality is all we need,
t/360 = a/pi*r^2 = s/2*pi*r.
Using that equality, which relates the central angle measure, the area of the sector, the radius, and the arc length, we can find the sector area as long as we know the radius length and the central angle or arc length measure.
If t is in radians instead of degrees, the preceding equality is adjusted to
t/2*pi = a/pi*r^2 = s/2*pi*r.
To see exactly how we use this equation to find sector area, watch the video lesson!
I hope you find this video helpful, and be sure to ask any questions down in the comments!
********************************************************************
The outro music is by a favorite musician of mine named Vallow, who, upon my request, kindly gave me permission to use his music in my outros. I usually put my own music in the outros, but I love Vallow's music, and wanted to share it with those of you watching. Please check out all of his wonderful work.
Vallow Bandcamp: https://vallow.bandcamp.com/
Vallow Spotify: https://open.spotify.com/artist/0fRtu...
Vallow SoundCloud: / benwatts-3
********************************************************************
+WRATH OF MATH+
◆ Support Wrath of Math on Patreon: / wrathofmathlessons
Follow Wrath of Math on...
● Instagram: / wrathofmathedu
● Facebook: / wrathofmath
● Twitter: / wrathofmathedu
My Music Channel: / seanemusic
Смотрите видео How to Find the Area of a Sector of a Circle | Geometry, Circle Sectors, Sector Area онлайн без регистрации, длительностью часов минут секунд в хорошем качестве. Это видео добавил пользователь Wrath of Math 05 Февраль 2019, не забудьте поделиться им ссылкой с друзьями и знакомыми, на нашем сайте его посмотрели 504 раз и оно понравилось 11 людям.