Question

Question #30654

Answer 1

`A=5.5`

Explanation:

Since this is a rectangular gird, we use the formula `A=b/2+I-1`
where `b` is the number of boundery points and `I` is the number of the interior points.

We now count to get that the perimeter of the triangle only touches 3 points.

We now count again to see that there are 5 points inside the triangle.

Therefore, `A=3/2+5-1`
`A=1.5+5-1`
`A=5.5`

This method is extremely useful when you are dealing with shapes that are combinations of many other shapes.