Question

for Analytic Geometry I don't understand how to answer this: The vertices of a right triangle are F(3,3), G(-1,4) and H(1,-5). Find the area of the triangle

Answer 1

deteminants are usful for this

Answer 2

331
-141
1-51

half of that determinant. but phone typing for this is near impossible

Answer 3

define two vectors and take 1/2 the determinant from those