2005 AMC 8 Problems/Problem 21
Problem
How many distinct triangles can be drawn using three of the dots below as vertices?
Solution
The number of ways to choose three points to make a triangle is . However, two of these are a straight line so subtract to get $\boxed{\texetbf{(C)}\ 18}$ (Error compiling LaTeX. Unknown error_msg).
See Also
2005 AMC 8 (Problems • Answer Key • Resources) | ||
Preceded by Problem 20 |
Followed by Problem 22 | |
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All AJHSME/AMC 8 Problems and Solutions |