Okay so today we’re levelling up from Pythagoras’ theorem in 2D to 3D Pythagoras 😏📦 We’re working with a cube, looking at the side length, the face diagonal, and then finding the full space diagonal (yep, corner to opposite corner 👀). This is all about right-angled triangles, square roots, and applying Pythagoras’ theorem step by step — first on the square face, then through the 3D shape. It might look complicated, but it’s literally just Pythagoras twice using the formula: By the end you’ll