Harmony between Squares and Pentagons. #Girih #Tesselation #MathPhoto17 #MathArt t.co/vMPqkUmsCq - @GirihApp

How many beads? #estimation #mathphoto17 t.co/u0SnOlrCvj - @mtrushkowsky

@carloliwitter Mine has #tessellation too! #MathPhoto17 t.co/kNOCqKGRRZ - @mskleinbart

Engineering model from 1872, #lines used to build arches. #London @sciencemuseum #MathIsEverywhere #MathPhoto17… t.co/4dPMHOhk3y - @daukmath

Outside an art shop in Venice. #tessellation #mathphoto17 t.co/eLMj6Akrnn - @pinn

A window #array on the school building behind our ultimate frisbee game. #mathphoto17 t.co/CwuU4v583T - @bkdidact

For #mathphoto17 this week: old switch board with #array if switches! At Blackberry Farm @FoxValleyParks t.co/rtKsvVqe7U - @mrsforest

#MathPhoto17 #tessellation t.co/HEl4B6shBQ - @martinsean

Crested Butte, Colorado Garden patio #lines #MathPhoto17 t.co/TlY04A1SdH - @HthrLynnJ

Week 2: estimation How many pieces of chalk? #mathphoto17 t.co/9igIaIMqZm - @rachelmarker

Spilt marbles...#estimation pic for #mathphoto17 t.co/7qH3poJp43 - @RiversoMaria

#mathphoto17 1x2 #array of doors containing 2x3 #arrays of windows t.co/xgeZZbnkdV - @jweber3rd

How many bales? How do you know? #arraychat #mathphoto17 #fwymath #MTBoS t.co/cAsSfEbdu4 - @MrsNewell22

Watercolor self-portrait of L at the Pipilotti Rist show. #tmwyk #array #mathphoto17 t.co/vTGoxEFFqH - @mtrushkowsky

#mathphoto17 #Tessellation Capilla de los Condestable a en la Catedral de Burgos t.co/MTMXB2Nysl - @alfgoralo

How many children will fit in the cardboard house? (Complete w/a white chimney and roof stabilizers) #mathphoto17… t.co/1SYeN68Dha - @sumboxes

Missed week #1 of #mathphoto17 but I'd like to share one sweet #tessellation example & one where you can stop to re… t.co/S7EuL6lDQE - @ccampbel14

No os perdáis este hashtag #MathPhoto17 La primera semana será sobre #teselaciones t.co/9gIkkJG7b1 t.co/KEuA2WmS1G - @Chuso_Jar

#mathphoto17 #tesselations t.co/JYErhGCoJa - @math_juten

#mathphoto17 #tesselations t.co/egn5Z8NtM1 - @math_juten

Late #tessellation post #mathphoto17 t.co/OiAKgez4F1 - @jweber3rd

So many types of #line #MathPhoto17 #Spain t.co/jN4y4Fpqz7 - @MelissaSeco

#lines while camping #MathPhoto17 t.co/giHA4wyoKp - @Just_in_Moore

Islamic Art #array in @mfaboston #mathphoto17 t.co/g4B5cCZuh4 - @mskleinbart

"may I please have 3 chocolate munchkins?" #unitchat #mathphoto17 t.co/2wS7xvHlqy - @cmmteach

#mathphoto17 sort of #Tessellation definitely #estimation! t.co/l0BG1mOX89 - @normabgordon

@carloliwitter I thought this huge piece of art would be good for #Units! #mathphoto17 t.co/ouVQWBLUCw - @RockRollTeacher

An #array of objects with an #array of reflections @mfaboston #mathphoto17 t.co/2nhR2POhBM - @julietaSpace

#Lines of the pattern and wrinkles of a sarong, in honor of Mathcamp reunion this past weekend. #mathphoto17 t.co/uipnweSIoO - @numberdance

How many of the brick buildings on the left could fit into the glass building on the right? #estimation #mathphoto17 t.co/bYKi2JouZG - @carloliwitter

Here's an #estimation photo that's not in season. How many shopping carts? How many ornaments? #mathphoto17 t.co/9WxOJHV5wC - @thegozaway

De las fotos de #gatitos que circulan por la web esta es mi favorita... :) #mathphoto17 t.co/a1GTQRELe2 - @profebernabeu

Lines in North Vancouver #mathphoto17 t.co/3hSraHNYb6 - @CDawson18

Furniture store #arrays!!! #arraychat #mathphoto17 #MTBoS t.co/bHobTAM1k9 - @NicoleBridge1

Tile art #Spain #units parts to make art #MathPhoto17 t.co/ETUJa6wKvK - @MelissaSeco

#lines of water in centennial fountain #mathphoto17 #tmc17 t.co/NudI1LSat6 - @cmmteach

Catching up w/#mathphoto17 :) Week 2: Estimation #CUSDRockstar #CUSDSchoolOfRock #elemmathchat t.co/Q7bDhZRTfm - @MsHaughs

Catching up w/#mathphoto17 :) Week 2: Estimation #CUSDRockstar #CUSDSchoolOfRock #elemmathchat t.co/Q7bDhZRTfm - @MsHaughs

#MathPhoto17 #estimation how large is this? #crochet #afghan t.co/IfVPq6MIkg - @JDaomath

How many water bottles? #estimation #MathPhoto17 #MTBoS t.co/wVA7PHyyrq - @JessicaBorah

How old was this tree? #estimation #mathphoto17 t.co/IXh9ye2hpo - @mtrushkowsky

What do you notice? #mathphoto17 t.co/yqxzkq8Odo - @approx_normal

Porch floor and shadow #lines intersect, with bonus mat #tessellation #mathphoto17 t.co/ysuVzPNAEm - @cmuirmath

#lines in the carpet of the governor's mansion at Colonial Williamsburg #mathphoto17 t.co/TNDOnQM30R - @cbellatl

Here's the #array of seats for my flight to SFO #mathphoto17 t.co/a7mUr0325z - @carloliwitter

#mathphoto17 #lines All the way from France! (Sadly, I'm not there... repost from @PeterAtAvalon) #MTBoS t.co/X3T2EX4ZAj - @MrsNewell22

Another pic for #mathphoto17. Pic by & from @CincinnatiZoo. Has the largest publicly accessible urban solar #array… t.co/J2h2P1GPWW - @mrsforest

More #PCMIsummer #mathphoto17 in TLP classroom! @carloliwitter @pegcagle @themathforum @mlarson_math @robertqberry… t.co/HzjKTBBjCQ - @SuMACzanne

Found some arrays on the ceiling of the Orpheum Theatre this evening at Harry Potter in Concert #MathPhoto17 #array… t.co/Uv3QA2bIZ5 - @jnovakowski38

#lines #mathphoto17 t.co/5In5ZirNGf - @Zakchamp