Skip to main content
guest
Join
|
Help
|
Sign In
analemma
Home
guest
|
Join
|
Help
|
Sign In
analemma
Wiki Home
Recent Changes
Pages and Files
Members
Favorites
20
All Pages
20
home
An Unexpected Right Angle
Bayes' Theorem
Circle as a limit of polygons
Circles of Apollonius
Combining Numbers
Complex logarithm
Constructing the square root
Cube roots, branch cuts, and Wolfram Alpha
Domain and Range
Eight Queens
Ellipse in a Box
Equilateral triangle and regular 9-gon
Eratosthenes measures Earth
Hinged squares
Lights Out
Logarithmic Spirals and Exponentiation
Math Video Sites
Missing square puzzle
Parabolas through three points
see more
Add
Add "All Pages"
Done
Equilateral triangle and regular 9-gon
Edit
0
4
…
0
Tags
No tags
Notify
RSS
Backlinks
Source
Print
Export (PDF)
This is a contest problem from the
AMC 12
, a mathematical contest for 12th grade students in the United States.
Given a nine-sided regular polygon, how many distinct equilateral triangles in the plane of the polygon have at least two vertices on the polygon?
This GeoGebra applet can be used to visualize the problem. Can you find the solution?
equilateral triangle and regular 9gon.ggb
Details
Download
6 KB
Javascript Required
You need to enable Javascript in your browser to edit pages.
help on how to format text
Turn off "Getting Started"
Home
...
Loading...
Given a nine-sided regular polygon, how many distinct equilateral triangles in the plane of the polygon have at least two vertices on the polygon?
This GeoGebra applet can be used to visualize the problem. Can you find the solution?