Geometry and algebra

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Across
  1. 2. a solid object with six equal square sides.
  2. 5. the number from which another number, the subtrahend, is to be subtracted.
  3. 9. the number you get by multiplying two or more numbers in mathematics.
  4. 10. When you multiply a number by another number, the second number is the multiplier.
  5. 12. Prism prism that the base is a rectangular straight.
  6. 13. a ball shape.
Down
  1. 1. having four straight equal sides and 90˚ angles at the corners.
  2. 2. a completely round shape, like the letter O.
  3. 3. used to show that one number or quantity is being subtracted from another.
  4. 4. the number to be subtracted from another number.
  5. 6. a number to be multiplied by another number, the multiplier.
  6. 7. the amount by which one thing is greater or smaller than another.
  7. 8. a shape that has four straight sides, two of which are usually longer than the other two, and four 90˚angles at the corners.
  8. 11. a flat shape with three straight sides and three angles.