# We have #A(0,0) B(21,0), C(0,21)#.How to find number of points that have both coordinates integer numbers inside triangle #ABC#?

##### 1 Answer

Jul 13, 2018

#### Explanation:

The triangle is delimited by the two axes and the line

So, both

So, if

belong to the triangle.

if

So, the following points are inside the triangle: