A brief illustrated guide to 'scissors congruence' − an ancient geometric idea that’s still fueling
This is a story about geometry, algebra and many different dimensions, best read with construction paper, scissors and tape on hand.

In math class, you probably learned how to compute the area of lots of different shapes by memorizing algebraic formulas. Remember “base x height” for rectangles and “½ base x height” for triangles? Or “
Read These Next
Far fewer Americans support political violence than recent polls suggest
Well-known flaws in conventional polling methods may be creating the incorrect perception that many…
How the government shutdown is making the air traffic controller shortage worse and leading to fligh
Air traffic controllers are considered essential workers and required to work without pay during the…
Natural World Heritage sites under growing threat, but bright spots remain
Many of these extraordinary places are increasingly at risk due to escalating climate change, invasive…