# How to Get a Bigger Brownie

Normally you cut a tray of brownies with straight lines to make squares or rectangles. If the pieces come out uneven, you hope you get the biggest one. But this cake-cutter by Matthias Wandel makes hexagons instead! Check out those cool chocolate-chip bars. There are only 3 shapes with all equal sides and angles that can fit together with no gaps or overlaps: hexagons, squares…and can you think of the last one? Triangles. Try cutting your brownies that way, too!

Wee ones: How many sides does a hexagon have? Check out the picture!

Little kids: If you eat a hexagon brownie and then a normal square one, how many edges do they have all together?  Bonus: If you cut 2 straight lines across a square cake and then 2 straight lines from back to front, how many pieces will you have?

Big kids: If you cut your brownies into 6 rows of 4 hexagons plus 6 half-hexagons, how many total hexagons do you have?  Bonus: If you can fit 36 squares instead, how many more brownies do you have by cutting squares?

The sky’s the limit: By what fraction is each of 27 hexagons bigger than one of the 36 squares from the same size tray?