This is the mathematical reason why manhole covers are round
The reason behind the shape of manhole covers have been revealed.
NPR17d
Circle Round
Created and produced by parents of young children, WBUR's Circle Round adapts carefully-selected folktales from around the world into sound- and music-rich radio plays for kids ages 3-103.
Hosted on MSN1y
Nothing screams great radio like going round and round in circles – at least to mathematicians
Mathematicians, she said, define circles not in visual terms, such as saying they’re regularly shaped or symmetrical, but by describing them as all points that are the same chosen distance away ...
BBC4y
2D Shapes
Images of the shapes appear as they are mentioned in the song. GIRL 1: (singing) (OTHERS repeat in brackets:) Circles are the round ones, they are everywhere we look. A 10p coin (a 10p coin), a ...