How many triangles can be formed whose corners lie on the grid? A triangle has to have nonzero area.

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter11: Rational And Irrational Numbers
Section11.6: The Pythagorean Theorem
Problem 11ST
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should be related to combinations/counting. please explain each step in detail and provide a simple solution PLEASE SHOW EACH STEP IN DETAIL. LIKE HOW CAN WE REMOVE THE STRAIGHT LINES THAT WERE COUNTED FROM c(16,3)?? this part i am lost how to find algebraically. 

How many triangles can be formed whose corners lie on the grid? A triangle has to have nonzero
area.
Transcribed Image Text:How many triangles can be formed whose corners lie on the grid? A triangle has to have nonzero area.
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