Birthday Clue #3

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Across
  1. 3. area is ___ times height
  2. 4. angle less than 90 degrees
  3. 6. all the way around the circle!
  4. 7. length times width times height
  5. 8. triangle whose sides are all the same
Down
  1. 1. half of the diameter
  2. 2. the math that studies shapes
  3. 4. opposite over ______ is tangent
  4. 5. kemp's math rap name