Maths

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Across
  1. 5. invented zero
  2. 7. those angles that sum up to 180 degrees
  3. 11. father of mathematics
  4. 12. longest side in a right-angled triangle
  5. 15. When the sum of two angles is equal to 90 degrees
  6. 16. a resultant number when one number is divided by the other number
  7. 19. if the lines are parallel
  8. 20. An angle which is measuring less than 90 degrees
Down
  1. 1. A constant is a value or number that never changes in expression
  2. 2. when 2 figures shape is same, but size is proportional
  3. 3. U-shaped curve that is drawn for a quadratic function
  4. 4. a line that passes through two lines in the same plane at two distinct points in the geometry
  5. 6. a number or quantity placed with a variable
  6. 8. A line that touches the circle at a single point
  7. 9. if the lines intersect at a point
  8. 10. an alphabet or term that represents an unknown number or unknown value or unknown quantity
  9. 13. instrument used for meaning angles with a rotating telescope
  10. 14. when 2 figures are in equal shape and size
  11. 17. triangle that has at least two sides of equal length
  12. 18. any angle greater than 90°