The Way of Geometry

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Across
  1. 1. A straight line that passes through the center of a circle, touching both sides.
  2. 7. A line from the center of a circle to any point on its edge.
  3. 9. Two lines that intersect at a 90-degree angle.
  4. 11. The distance around a circle.
  5. 12. Two lines that run side by side and never meet.
  6. 14. An angle that is less than 90 degrees.
  7. 15. A flat shape with straight sides that is closed.
Down
  1. 2. A triangle that has one 90-degree angle.
  2. 3. When two shapes have the same size and shape.
  3. 4. A four-sided polygon.
  4. 5. An angle that is greater than 90 degrees but less than 180 degrees.
  5. 6. The longest side of a right triangle, opposite the right angle.
  6. 8. The point where two lines or edges meet.
  7. 10. When two shapes have the same shape but different sizes.
  8. 13. The space between two intersecting lines, measured in degrees.