Maths Crossword

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Across
  1. 4. A number that has exactly two factors (5 letters)
  2. 6. The part of a circle enclosed in a chord and arc. (7 letters)
  3. 8. The total surface area of a sphere is 4πr ____ (6 letters)
  4. 9. The point of intersection of the x and y axis. (6 letters)
  5. 10. Two identical triangles are said to be _____. (9 letters)
Down
  1. 1. The value of a letter in an equation (8 letters)
  2. 2. The total length of the boundary of a shape. (9 letters)
  3. 3. The longest side in a right-angled triangle (10 letters)
  4. 5. A sequence with a constant difference between terms (9 letters)
  5. 7. A graph of a linear equation is a ____ (4 letters)