Area of Triangle
By admin • Mar 17th, 2008 • Category: UncategorizedAREA OF A TRIANGLE
If D represents the area of a triangle then
D = 1/2 ab sin C = 1/2 bc sin A = 1/2 ca sin B
D = {s(s-a)(s-b)(s-c)}1/2
D = abc/4R
D = rs
where 2s= a+b+c and r is the inradius of the triangle
NOTE:
RELATION BETWEEN r AND R
r = 4 R sin A/2 sin B/2 sin […]