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(cheerful music) (electronic gadgets whirring and ringing) - [Children] Math Mights! Welcome, 2nd grade Math Mights. My name is Mrs. McCartney. I'm so excited that you've joined us today for our show.

Math Riddles: Today, we bring another set of missing shapes puzzles with difficulty level hard. In this missing shapes puzzle, one has to figure out which is the next shape in the sequence. There are ...

Debates over how geometry is understood and learned date back at least to the days of Plato, with more recent scholars ...