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How do you find the area of a triangle when you don't have a right angle or an altitude?. You can use the coordinates in order to find the area of the triangle
:20 Sample problem one Find the area of a triangle that is drawn on a coordinate plane
The triangle does not have a right angle or an altitude drawn
:39 Step one Identify the vertices and write down the coordinates
1:09 Use the formula Area = Ax(By-Cy) + Bx(Cy-Ay)+(Ay-By)/2
in order find the area of the triangle
2:00 Plug the coordinates into the area formula
3:17 Simplify the formula after plugging in numbers
4:16 Answer to the sample problem involving finding the area of a triangle on a coordinate plane
For other methods of finding the area of a triangle see
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