Heron's Formula

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Across
  1. 1. Person who was Born in 10AD possibly in Alexandria in Egypt and also worked in applied mathematics.
  2. 4. half the perimeter of triangle.
  3. 6. Another name of trapezoids in older times.
  4. 7. It is also the semi perimeter of the triangle
  5. 8. Triangle in which only two sides are equal.
Down
  1. 2. Triangle in which all sides are equal.
  2. 3. Unit of measurement for length or breadth.
  3. 5. Triangle in which formula of 1\2 multiplied by base and height could be directly applied.