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sassmistress's review
4.5
This one gives you a little more to work with as you solve the mystery. It introduces Euler's Law (not named until an epilogue) and proportions (looking for a cone 3x as tall as its base). Towards the end they suggest the solution but give four possible cones, and you can do some quick napkin math to figure out which one holds the hidden sword. More math puns with people's names made me chuckle.
votrikhon's review
4.0
EULER'S LAW
Flat Face + point - edge = 2 in any polyhedron.
An curious and intelligent story to tell about Euler's law through cube, rectangular prism, triangular prism, pyramid, cylinder and cone.
Flat Face + point - edge = 2 in any polyhedron.
An curious and intelligent story to tell about Euler's law through cube, rectangular prism, triangular prism, pyramid, cylinder and cone.
poplartears's review
3.0
Another fun math adventure. They loved Edgecaliber. Radius introduced the geometric solids wonderfully.
jarchivistkinnie's review
3.0
again, good for children and wonderfully illustrated.
Again, i don't know why i'm being read this in math class, seeing as we're all teens, but ah well.
Again, i don't know why i'm being read this in math class, seeing as we're all teens, but ah well.
engpunk77's review
2.0
Same clever humor, but this one didn't seem to teach anything useful for practical application. It showed us that "if you add the number of faces on a geometric solid to the number of its points (vertices) and then subtract the number of its edges, the answer will always be two. It works for any polyhedron..."
Yeah, but who cares?
Yeah, but who cares?
mmattmiller's review against another edition
4.0
This was a great Goodwill find! Will share with my math specialist, but will also share with my students! It is pretty wordy, and a long story for a math lesson my (elementary) students probably won't need to apply, but definitely could figure out! Would be a fun activity building up to certain points of the story, then let them play around a bit. (Can give them shapes and let them count faces, edges, etc. and do the math. Let them discover Euler's Law! Can also let them play around with heights and diameters of cones to figure out which is 3 times taller than the base is wide...) This will be fun!