Physics and Maths

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Across
  1. 1. A part of a line that starts at one point and goes on forever in one direction.
  2. 4. A number that divides another number exactly.
  3. 8. A letter or symbol that stands for a number we don’t know yet.
  4. 9. two or more sets is a new set that contains all elements that are in any of the sets.
  5. 10. Having exactly the same shape and size (used in geometry).
Down
  1. 2. Sum of numbers divided by how many numbers there are.
  2. 3. lines that meet or cross at a right angle (90°).
  3. 4. The bottom number in a fraction.
  4. 5. To change something from one form or unit to another.
  5. 6. A vertical line of numbers or items
  6. 7. A set whose elements are all in another set.