Susanna Post, the 2021 Arkansas Teacher of the Year, is getting ready for a model sailboat race. Her sailboat has triangular-shaped sails. Can you help her name and classify triangles? Rise and Shine ...
Add Yahoo as a preferred source to see more of our stories on Google. A large triangular sail made of silver foil is unfurled in a hangar as scientists look on. NASA has reached a significant ...
About a year from now, if all goes well, a box about the size of a loaf of bread will pop out of a rocket some 500 miles above Earth. There in the vacuum it will unfurl four triangular sails.
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