b) The shape is a regular heptagon, so all the angles must be equal. The shape has 5 sides and can be split into 3 triangles. The sum of the angles is \(3 \times 180 = 540^{\circ}\). To find the ...

Heptagon has its headquarters in Espoo ... lightweight pieces of glass or polymer that can focus light, shape it, split it, or disperse it. These optics have surface features that make a match ...