<h2>Answer:</h2>
A triangle is any polygon with exactly 3 sides. Let's call this sides the vertices of the triangle, and let's say:
Where:
A formula for finding the area of a triangle given its vertices is:
<em>Finally, the area of the triangle defined by the coordinates (7,1), (0,10), and (9,4), to the nearest tenth is 19.5 squared units.</em>