Triangle Crossword

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Across
  1. 4. the perpendicular segment drawn from a vertex to its opposite side
  2. 6. a figure that has three straight sides and three angles
  3. 7. the intersection of the three bisectors
  4. 8. the three altitudes intersect at a point called the...
Down
  1. 1. the intersection of the three perpendicular bisectors
  2. 2. the line segment that joins a vertex to the midpoint of the opposite side
  3. 3. the line running perpendicular to the side through its midpoint; perpendicular ____
  4. 5. the intersection of three medians