Heron's Formula

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Across
  1. 3. √3/4a^2 is a formula for the area of which type of triangle
  2. 4. (a+b+c)/2 is ______ of a triangle
  3. 5. Heron's formula is based on whom?
  4. 6. For which shape heron's formula is made?
  5. 7. Area of a triangle = 1/2 x Longest side x _______________
Down
  1. 1. Heron's formula is used to find _____ of triangle
  2. 2. Which sign is used in Heron's formula?
  3. 5. Area of a triangle when _____ and a base is given is 1/2 x b x h.