Crossword (triangle and quadrilateral)

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Across
  1. 2. the total space taken up by a flat (2-D) surface or shape of an object.
  2. 5. L x w is formula area of?
  3. 7. A shape with D1 and D2 with different side length
  4. 8. Base x height is the formula area of?
  5. 9. A shape with D1 and D1 with the same length side
Down
  1. 1. A thing that you need to count around the outer shape
  2. 3. Each has 1 rotational symmetry and 1 line symmetry.
  3. 4. S+s+s+s is formula perimeter of?
  4. 5. 4 x side is formula perimeter of?
  5. 6. base x height : 2 is the area formula of?