# A triangle is formed by the points A(-1,1) B(4,3) and C (0,13)?

##### 1 Answer

Jul 20, 2015

ABC is a triangle, with area

#### Explanation:

Slope

The slope of a line through

The slope of a line through

So these three points are not colinear and do form the vertices of a triangle.

Let

Then the area of the triangle is: