Area of Triangle

[greatwhiteshark]

Prove that area A of a triangle is given by the formula:

A = a^2(sinBsinY)/2sinA, where B = beta, Y = gamma and A = alpha.

Do I need to use A = 1/2 times base times height? If so, in what way?

 

[tkhunny]

Draw a triangle. Label it's parts consistent with your formula. Figure it out using logical constructions.

½*Base*Hieght certainly can be used th check your answer. It MAY be a good place to START your proof, since you probably can use it axiomatically (assume that it's valid).

 

[greatwhiteshark]

ok

I thank you.