Shapes

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Across
  1. 6. A four-sided polygon with two parallel sides
  2. 8. A type of engineering focused on electricity
  3. 9. The strongest 2D shape in engineering
Down
  1. 1. The measure around a 2D shape
  2. 2. The type of stress that pulls on a material
  3. 3. The study of designing and building structures
  4. 4. The force that resists motion between surfaces
  5. 5. A three-sided polygon
  6. 7. The amount of space inside a 3D shape