SOLUTION: How do I show that the area of a triangle can be given by the formula {{{A=(1/2)absinx}}} Im not sure how to start, any help will be very appreciated

Question 791025: How do I show that the area of a triangle can be given by the formula
Im not sure how to start, any help will be very appreciated
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
Consider a triangle with the
points marked as A,B and C
The sides opposite to the points
are denoted as a,b and c respectively.
The formulae you can use are:
1/2abSinC
1/2bcSinA
1/2acSinB
You are using the size of two sides
and one angle.
Example:
Triangle ABC
Angle A = 100 degrees
side c = 6cm
side b = 5cm
Using formula:
1/2 bcSinA
= 1/2 * 5 * 6 * Sin100
=1/2 * 5 * 6 * 0.985
= 14.8cm.
Hope this helps.
:-)

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