Matchstick Triangles

Author:James R Olsen

Use the app to figure out the number of triangles (of any size) in a triangular matchstick arrangement of side n. The example shown has a side of 5 (n=5). Can you generalize?

New Resources

Graph of y = ax² + bx + c
apec
Average Distance
Triangle Flexer
Untitled

Discover Resources

Reciprocal quadratic function graphs
AP 2007AB_1b (modified)
Bisect an Angle
Snowflake--Hexagons
NTI Water Park Project

Discover Topics

Arithmetic Mean
Intersection
Tangent Function
Statistical Characteristics
Ratios