WeBWorK Standalone Renderer

Plot the points $A=(-1, 0)$ , $B=(0, 4)$ , and $C=(7, -2)$ . Notice that these points are vertices of a right triangle (the angle $A$ is 90 degrees).
Find the distance between $A$ and $B$ :
Find the distance between $A$ and $C$ :
Find the area of the triangle $ABC$ :

You can earn partial credit on this problem.