Number system and Heron's Formula

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Across
  1. 1. Any number which can express in form of p/q is called
  2. 2. number which starts from 0 are called
  3. 3. triangle which has all equal Sides
  4. 5. numbers which don't start from 0 are
  5. 6. triangle which has two equal sides
  6. 7. triangle which has three different length sides
Down
  1. 1. collection of all types of numbers are called
  2. 4. Number which cannot be Express in form of p by Q are
  3. 6. natural numbers 1,2,3 including negative numbers are called