PreCalculus - Trigonometry: The Right Triangle (3 of 26) Area of Sector (Circle)

In this video I will develop the general equation of an area of a sector (circle) and triangle.

[Golden_Tortoise]

Very cool logical breakdown of area of a circle

[sunilbasker]

Very clear & concise explanation. Thank you for the series

[albertopoli]

Excuse me for another question. At minute 2.10 you have written that base is equals to R. But Is not R the hypotenuse?

[dineshroy]

Area of triangle is 1/2 r" sin*
Pls prove it