Maths

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Across
  1. 1. a closed shape with 3 or more straight sides
  2. 4. a shape with two parallel lines and supplementary co-interior angles
  3. 5. the amount of space occupied by any 3D solid
  4. 6. a shape with infinite lines of symmetry
  5. 7. consists of two algebraic statements and includes equals-to sign
Down
  1. 1. a rate, number, or amount in each hundred
  2. 2. a comparison between two numbers or proportions
  3. 3. where letters and other general symbols are used to represent numbers and quantities in formulae and equations
  4. 4. a line forming the boundary of a closed geometrical shape