Name This Polygon Part 1

Geometry Level 2

Which of these four figures is called an ICOSIKAIPENTAGON ?

(A)

(B)

(C)

(D)

A B C D

Zandra Vinegar by Zandra Vinegar

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3 solutions

Eli Ross Staff
Sep 17, 2015

An ICOSIKAIPENTAGON has 25 sides -- the name comes from the greek word for 20, ekosi.

The polygon in choice (A) is the only one with 25 sides. Can you name the other 3 shapes?

3 Helpful 0 Interesting 0 Brilliant 0 Confused

I'm not 100% on my counting (especially on the last one), but I believe:

B is a tricontahexagon (36 sides) C is a heptakaidecagon (17 sides) D is a octacontatetragon (84 sides)

Ian McKay - 5 years, 9 months ago
Otto Bretscher
Sep 18, 2015

ϵ ι κ ο σ ι \epsilon\iota\kappa\omicron\sigma\iota κ α ι \kappa\alpha\iota π ϵ ν τ ϵ \pi\epsilon\nu\tau\epsilon ... twenty and five

0 Helpful 0 Interesting 0 Brilliant 0 Confused
Ahsan Azhar
Sep 17, 2015

Just count the sides...if these are 25 then it is ICOSIKAIPENTAGON

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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