Figure 1: Interfacial geometry at perimeter features directs expression of CSC markers. Figure 2: Geometric cues activate CSCs at the perimeter through integrin α5β1, mitogen-activated protein kinase ...

The perimeter is the total distance around the edge of a 2D shape. Since it is a length, the metric units for perimeter are millimetres (mm), centimetres (cm), metres (m) and kilometres (km).

ZACH: Our virtual house design is looking pretty cool. There’s something missing though. KAYLA: Some windows might be nice. ZACH: Oh yeah, I designed some earlier. ADA: To build the windows, you need ...

Introduction Do you ever use math as a tool to solve interesting problems? In the 1970s math was often taught with simple worksheets. One teacher was looking for a way to help his students have more ...