What is the area of the triangle in the diagram?

Question

mathmale · Answer

Please share the diagram showing the triangle in question.  Please also share what you know already about this problem and what you're not sure of.

anonymous · Answer

attachment

anonymous · Answer

@mathmale

mathmale · Answer

First, what is the formula for the area of a triangle?  Is there any other such formula, besides the most common form?

anonymous · Answer

1/2(x1−y1)(x2−y1) 

1/2 y1 (x2−x1) 

1/2 (x2−x1) 

1/2 √(x22−y21)(x21−y21) 
Done

mathmale · Answer

Next, spend some time looking at the given triangle.  

Which side would you call the "height?"

Which side would you call the "base?"

How would you express the height?  the base?

Substitute your results (base and height) into the formula for the area of a triangle.