How to find area of Triangle in co-ordinate Geometry

What is co-ordinate geometry?

Introduction to Co-ordinate Geometry

Introduction to co-ordinate geometry

Find the missing co-ordinate

Find the co-ordinate of centre of circle,which co-ordinate of diameter are respectively (a,a) and (-a,-a)

A boy moving along the ellipse (x^(2))/(32)+(y^(2))/(18)=1 at each and every point on it he is drawing a tangent and finding the area of triangle formed by it with co-ordinate axes.He found that area of triangle is >=m and is m at P Q,R and S . Question: Eccentricity of the ellipse is