Group 2 Crossword

1234
Across
  1. 1. the middle number in a sequence of number when placed in order from least to greatest
  2. 3. the distance across a circle from one side to the other
  3. 4. an angle which measures greater than 90 degrees but less than 180 degrees
Down
  1. 1. the sum of a group of numbers divided by how many there are
  2. 2. the set of whole numbers and their opposites