7-Day Shape Spotting Streak
Each day, find and name one shape in everyday life, like a hexagonal tile or a cylindrical can. Check in with your find.
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Science · Facts & stats · iChallenge network
Daily facts and stats about shapes and geometry, plus real challenges to put them to work.
How many sides does an octagon have?
Octo means eight, so an octagon has eight sides.

One ranked attempt per day. Practice as much as you like.
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Each day, find and name one shape in everyday life, like a hexagonal tile or a cylindrical can. Check in with your find.
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Draw a cube net on paper, cut it out, fold it into a cube and post a photo.
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Cut a square into the seven tangram pieces and arrange them into an animal shape. Post a photo.
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Live counts from ShapeChallenge.com. All arena stats →
Earned on any arena, shown on your profile everywhere.
Add your email to keep your level, streak and badges if you switch devices, and carry them to every iChallenge arena. One email when you save; no spam.
Fund a prize on ShapeChallenge.com and your brand sits on the challenge card, the leaderboard and every finisher's share. Prizes only appear once they're funded, so players can trust what they see.
Play today's quiz round, post your score, and start a streak.
XP, levels, streaks and badges. Save your progress with an email and it follows you to every arena on the iChallenge network.
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
100 points per correct answer, up to 50 more for answering quickly, a combo multiplier for answers in a row, and 150 bonus points for a perfect round.
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.